diff --git a/app/PaymentDrivers/Mollie/CreditCard.php b/app/PaymentDrivers/Mollie/CreditCard.php
index 16741b1c7226..75f87fff285a 100644
--- a/app/PaymentDrivers/Mollie/CreditCard.php
+++ b/app/PaymentDrivers/Mollie/CreditCard.php
@@ -52,7 +52,7 @@ class CreditCard
     public function paymentResponse(PaymentResponseRequest $request)
     {
         // TODO: Unit tests.
-        $amount = number_format((float) $this->mollie->payment_hash->data->amount_with_fee, 2, '.', '');
+        $amount = $this->mollie->convertToMollieAmount((float) $this->mollie->payment_hash->data->amount_with_fee);
 
         $this->mollie->payment_hash
             ->withData('gateway_type_id', GatewayType::CREDIT_CARD)
diff --git a/app/PaymentDrivers/MolliePaymentDriver.php b/app/PaymentDrivers/MolliePaymentDriver.php
index 60c27321e8ed..44d6dcfac886 100644
--- a/app/PaymentDrivers/MolliePaymentDriver.php
+++ b/app/PaymentDrivers/MolliePaymentDriver.php
@@ -115,7 +115,7 @@ class MolliePaymentDriver extends BaseDriver
 
     public function refund(Payment $payment, $amount, $return_client_response = false)
     {
-        return $this->payment_method->yourRefundImplementationHere();
+        
     }
 
     public function tokenBilling(ClientGatewayToken $cgt, PaymentHash $payment_hash)
@@ -192,4 +192,15 @@ class MolliePaymentDriver extends BaseDriver
             );
         }
     }
+
+    /**
+     * Convert the amount to the format that Mollie supports.
+     * 
+     * @param mixed|float $amount 
+     * @return string 
+     */
+    public function convertToMollieAmount($amount): string
+    {
+        return \number_format((float) $amount, 2, '.', '');
+    }
 }