diff --git a/Controller/tpay/Create.php b/Controller/tpay/Create.php
index d006e28..9d2e992 100644
--- a/Controller/tpay/Create.php
+++ b/Controller/tpay/Create.php
@@ -82,7 +82,11 @@ public function execute(): ResponseInterface
 
             if (6 === strlen($additionalPaymentInformation['blik_code'] ?? '') && $this->tpay->checkBlikLevel0Settings()) {
                 if (true === $this->transaction->isOpenApiUse()) {
-                    return $this->_redirect('magento2basic/tpay/success');
+                    if (isset($transaction['payments']['errors']) && count($transaction['payments']['errors']) > 0) {
+                        return $this->_redirect('magento2basic/tpay/error');
+                    } else {
+                        return $this->_redirect('magento2basic/tpay/success');
+                    }
                 }
                 $result = $this->blikPay($transaction['title'], $additionalPaymentInformation['blik_code']);
                 $this->checkoutSession->unsQuoteId();
@@ -93,7 +97,7 @@ public function execute(): ResponseInterface
                         'User has typed wrong blik code and has been redirected to transaction panel in order to finish payment'
                     );
 
-                    return $this->_redirect($transactionUrl);
+                    return $this->_redirect('magento2basic/tpay/error');
                 }
 
                 return $this->_redirect('magento2basic/tpay/success');
@@ -135,7 +139,7 @@ private function prepareTransaction($orderId, array $additionalPaymentInformatio
             }
         }
 
-        if ($data['channel']) {
+        if (isset($data['channel']) && $data['channel']) {
             return $this->transaction->createWithInstantRedirection($data);
         }
 
@@ -149,6 +153,11 @@ private function handleBlikData(array &$data, string $blikCode)
                 'blikToken' => $blikCode,
             ];
         }
+        if (!$this->transaction->isOpenApiUse()) {
+            unset($data['channel']);
+            unset($data['currency']);
+            unset($data['language']);
+        }
     }
 
     private function handleOpenApiTrId(array &$paymentData, array $transaction)
diff --git a/Model/ApiFacade/OpenApi.php b/Model/ApiFacade/OpenApi.php
index 8b97662..eea6e68 100755
--- a/Model/ApiFacade/OpenApi.php
+++ b/Model/ApiFacade/OpenApi.php
@@ -85,11 +85,11 @@ private function handleDataStructure(array $data): array
         }
 
         if ($data['group']) {
-            $paymentData['pay'] = ['groupId' => $data['group']];
+            $paymentData['pay']['groupId' ] = $data['group'];
         }
 
         if ($data['channel']) {
-            $paymentData['pay'] = ['channelId' => $data['channel']];
+            $paymentData['pay']['channelId'] = $data['channel'];
         }
 
         return $paymentData;