only trigger new paymentMethods call when the country has changed

view/frontend/web/js/model/adyen-payment-service.js

@@ -32,7 +32,7 @@ define(
             /**
              * Retrieve the list of available payment methods from the server
              */
-            retrieveAvailablePaymentMethods: function (callback) {
+            retrieveAvailablePaymentMethods: function (callback = null) {
                 var self = this;
 
                 // retrieve payment methods
@@ -56,7 +56,9 @@ define(
                 ).done(
                     function (response) {
                         self.setPaymentMethods(response);
-                        callback();
+                        if (callback !== null) {
+                            callback();
+                        }
                     }
                 ).fail(
                     function (response) {

view/frontend/web/js/view/payment/method-renderer/adyen-hpp-method.js

@@ -130,8 +130,17 @@ define(
                     });
                     self.messageComponents = messageComponents;
 
-                    quote.shippingAddress.subscribe( function(address) {
-                        adyenPaymentService.retrieveAvailablePaymentMethods();
+                    var shippingAddressCopuntryCode = quote.shippingAddress().countryId;
+                    console.log(shippingAddressCopuntryCode);
+
+                    quote.shippingAddress.subscribe( function(shippingAddress) {
+                        console.log(shippingAddressCopuntryCode);
+                        console.log(shippingAddress.countryId);
+
+                        if (shippingAddressCopuntryCode != shippingAddress.countryId) {
+                            adyenPaymentService.retrieveAvailablePaymentMethods();
+                            shippingAddressCopuntryCode = shippingAddress.countryId;
+                        }
                     });
 
                     fullScreenLoader.stopLoader();