updated documentation

README.md

@@ -135,6 +135,7 @@ Also you can call for Refund Request and check Refund State
     public function refund($bankID)
     {
         $refund = SSLCommerz::refund($bankID,$refund_amount);
+	$refund = json_decode($refund);
 
         if($refund->status)
         {
@@ -168,7 +169,8 @@ Also you can call for Refund Request and check Refund State
     public function check_refund_status($refID)
     {
         $refund = SSLCommerz::query_refund($refID);
-
+	$refund = json_decode($refund);
+
         if($refund->status)
         {
             /**
@@ -207,7 +209,8 @@ Also you can query for your Transaction based on the Transaction ID you provided
     public function get_transaction_status($trxID)
     {
         $query = SSLCommerz::query_transaction($trxID);
-
+	$query = json_decode($query);
+
         if($query->status)
         {
             dd($query->output);
@@ -318,4 +321,4 @@ Please see [CHANGELOG](CHANGELOG.md) for more information what has changed recen
 
 ## License
 
-The MIT License (MIT). Please see [License File](LICENSE.md) for more information.
+The MIT License (MIT). Please see [License File](LICENSE.md) for more information.