diff --git a/src/Base.php b/src/Base.php
index 841b7ab..523afd4 100644
--- a/src/Base.php
+++ b/src/Base.php
@@ -175,17 +175,6 @@ public function getBaseUrl(): string
         return $this->base_url;
     }
 
-
-    /**
-     * Verify Payment
-     * @throws Exception
-     */
-    public function verifyPayment($paymentRefId)
-    {
-        $url = $this->base_url . 'verify/payment/' . $paymentRefId;
-        return Helper::httpGet($url);
-    }
-
     /**
      * @throws NagadPaymentException
      */
diff --git a/src/Helper.php b/src/Helper.php
index f7a7f54..e8d51db 100644
--- a/src/Helper.php
+++ b/src/Helper.php
@@ -75,7 +75,7 @@ public function encryptDataWithPublicKey($data): string
             return base64_encode($cryptoText);
         }
 
-        throw new ExceptionHandler('Invalid Public key');
+        throw new ExceptionHandler('Invalid Public key.  Check Public Key in Configuration');
     }
 
     /**
@@ -94,7 +94,7 @@ public function signatureGenerate($data): string
             return base64_encode($signature);
         }
 
-        throw new ExceptionHandler('Invalid private key');
+        throw new ExceptionHandler('Invalid private key. Check Private Key in Configuration');
     }
 
     /**
@@ -133,7 +133,6 @@ public function httpPostMethod(string $postUrl, array $postData)
         $response = json_decode($resultData, true);
         curl_close($url);
         return $response;
-
     }