Item Sold but Order not showing...

I got one sell.. But order not showing in Dashboard and Order Option....I checked everything...
Also, I haven't received any email about sold item..
My Payment Gateway sent us email about product sold... What the problem... ?

Did you check the database, if order is present in database. Or have you tried placing a dummy order. It would be great if you do testing work. As it will give you more idea about issue.

I recently had this issue myself, turns out it was a number of things. My webhost had to reset cURL libraries and I had to remove the php.ini file located in my domain root directory. Worked after that.

Also, you need to make sure your payment gateway providers settings are correct. Not the ones in opencart admin, the ones you set up with your payment gateway account.