diff --git a/samples/OrderCreate.php b/samples/OrderCreate.php
index a616041..95690d4 100644
--- a/samples/OrderCreate.php
+++ b/samples/OrderCreate.php
@@ -15,7 +15,7 @@
 $request->setDescription('Order ABC0123456789');
 $request->setAmount((float)($_REQUEST['amount'] ?? 5.3));
 $request->setCurrency('EUR');
-$request->setExpire(date('Y-m-d H:i:s', strtotime('+1 DAY')));
+$request->setExpire(date('c', time() + 60));
 $request->setReturnurl($_REQUEST['returnUrl'] ?? 'https://yourdomain/finish.php');
 $request->setExchangeUrl($_REQUEST['exchangeUrl'] ?? 'https://yourdomain/exchange.php');
 $request->setPaymentMethodId((int)($_REQUEST['paymentMethodId'] ?? 10));
diff --git a/samples/OrderStatus.php b/samples/OrderStatus.php
index c0257e2..97652bc 100644
--- a/samples/OrderStatus.php
+++ b/samples/OrderStatus.php
@@ -41,6 +41,7 @@
 echo 'isRefunded: ' . ($payOrder->isRefunded() ? 'YES' : 'no') . PHP_EOL;
 echo 'isPartiallyRefunded: ' . ($payOrder->isRefundedPartial() ? 'YES' : 'no') . PHP_EOL . PHP_EOL;
 echo 'isFastcheckout: ' . ($payOrder->isFastcheckout() ? 'YES' : 'no') . PHP_EOL;
+echo 'getAmountRefunded: ' . ($payOrder->getAmountRefunded()) . PHP_EOL . PHP_EOL;
 echo 'getStatusCode: ' . $payOrder->getStatusCode() . PHP_EOL;
 echo 'getStatusName: ' . $payOrder->getStatusName() . PHP_EOL;
 echo 'getId: ' . $payOrder->getId() . PHP_EOL;
diff --git a/samples/ServiceGetConfig.php b/samples/ServiceGetConfig.php
index 4b5d75e..231677e 100644
--- a/samples/ServiceGetConfig.php
+++ b/samples/ServiceGetConfig.php
@@ -36,7 +36,7 @@
 $terminals = $config->getTerminals();
 print_r($terminals);
 
-$tguList = $config->getTguList();
+$tguList = $config->getCores();
 print_r($tguList);
 
 $paymentMethods = $config->getPaymentMethods();
diff --git a/samples/TransactionStatus.php b/samples/TransactionStatus.php
index 3563465..6176568 100644
--- a/samples/TransactionStatus.php
+++ b/samples/TransactionStatus.php
@@ -38,6 +38,8 @@
 echo 'isPartialPayment: ' . ($payOrder->isPartialPayment() ? 'YES' : 'no') . PHP_EOL;
 echo 'isRefunded: ' . ($payOrder->isRefunded() ? 'YES' : 'no') . PHP_EOL;
 echo 'isPartiallyRefunded: ' . ($payOrder->isRefundedPartial() ? 'YES' : 'no') . PHP_EOL . PHP_EOL;
+echo 'getAmount: ' . ($payOrder->getAmount()) . PHP_EOL;
+echo 'getAmountRefunded: ' . ($payOrder->getAmountRefunded()) . PHP_EOL . PHP_EOL;
 echo 'getStatusCode: ' . $payOrder->getStatusCode() . PHP_EOL;
 echo 'getStatusName: ' . $payOrder->getStatusName() . PHP_EOL;
 echo 'getId: ' . $payOrder->getId() . PHP_EOL;
diff --git a/src/Model/Method.php b/src/Model/Method.php
index 2c61031..a380b00 100644
--- a/src/Model/Method.php
+++ b/src/Model/Method.php
@@ -159,7 +159,7 @@ public function setOptions(array $options): self
      */
     public function getSettings(): array
     {
-        return $this->settings;
+        return $this->settings ?? [];
     }
 
     /**
diff --git a/src/Model/Pay/PayOrder.php b/src/Model/Pay/PayOrder.php
index 0f5c839..a5bde9d 100644
--- a/src/Model/Pay/PayOrder.php
+++ b/src/Model/Pay/PayOrder.php
@@ -130,6 +130,11 @@ class PayOrder implements ModelInterface
      */
     protected $completedAt;
 
+    /**
+     * @var Amount
+     */
+    protected $amountRefunded;
+
     /**
      * @var array
      */
@@ -153,6 +158,27 @@ public function __construct($payload = null)
         }
     }
 
+    /**
+     * @return mixed
+     */
+    public function getAmountRefunded()
+    {
+        if (!empty($this->amountRefunded) && $this->amountRefunded instanceof Amount) {
+            return $this->amountRefunded->getValue() / 100;
+        }
+        return null;
+    }
+
+    /**
+     * @param $amountRefunded
+     * @return $this
+     */
+    public function setAmountRefunded($amountRefunded): self
+    {
+        $this->amountRefunded = $amountRefunded;
+        return $this;
+    }
+
     /**
      * @return string
      */
diff --git a/src/Model/Response/ServiceGetConfigResponse.php b/src/Model/Response/ServiceGetConfigResponse.php
index cdc85d4..a7ad8d9 100644
--- a/src/Model/Response/ServiceGetConfigResponse.php
+++ b/src/Model/Response/ServiceGetConfigResponse.php
@@ -316,7 +316,7 @@ public function setCategory(array $category): void
      */
     public function getTguList(): array
     {
-        return $this->tguList;
+        return $this->tguList ?? [];
     }
 
     /**
diff --git a/src/Util/Exchange.php b/src/Util/Exchange.php
index cae6240..aa63f0a 100644
--- a/src/Util/Exchange.php
+++ b/src/Util/Exchange.php
@@ -4,7 +4,6 @@
 
 namespace PayNL\Sdk\Util;
 
-use PayNL\Sdk\Config\Config as PayConfig;
 use PayNL\Sdk\Config\Config;
 use PayNL\Sdk\Model\Amount;
 use PayNL\Sdk\Model\Request\OrderStatusRequest;
@@ -201,11 +200,11 @@ public function getPayLoad()
     /**
      * Process the exchange request.
      *
-     * @param Config|null $config
+     * @param Config |null $config
      * @return PayOrder
      * @throws Exception
      */
-    public function process(PayConfig $config = null): PayOrder
+    public function process(Config $config = null): PayOrder
     {
         $payload = $this->getPayload();