bug fixes on UI

lib/screens/pay/pay_controller.dart

@@ -18,6 +18,7 @@ class PayScreenModel {
   hc.BillProvider? selectedProvider;
   BillProduct? selectedProduct;
   PaymentProcessor? selectedPaymentProcessor;
+  String region = '';
   bool isLoading = false;
   String? errorMessage;
   String? status;
@@ -99,6 +100,7 @@ class PayController extends ChangeNotifier {
             creditEmail: transactionController.model.formData.creditEmail,
             productUid: model.selectedProduct?.uid,
             billProductName: model.selectedProduct?.name,
+            region: model.region,
           );
 
       dynamic workflowResponse = await http.post(