confirm order after 3rd party payment gateway

[mkelowna]

I am writing a 3rd party payment gateway that is succesfully going to the merchant website.

 

In my return url i am running the following redirect:

 

Tools::redirect('http://www.example.com/-confirmation.php?=order-confirmation?secure_key='.$customer->secure_key.'&id_cart='.$id_cart);

 

However, when I run this the order is not appearing in the customer's orders.

 

What am I missing?

 

Thanks.