I have tested payment, I don't want transaction.

I just submitted a payment to myself, testing the process. I expected one more "Are you sure you want to make this payment" button, and I didn't get one. The payment went through. How can I void the transaction? I don't want it counting as one of my only 10 monthly free transactions.  Which brings me to my next issue:  Why don't you have a "test" option, to ensure users that their payment request form works?  Like others, you should have a 1 cent test process, where they can check to ensure payment process is working correctly.

In fact, Square integration has the test mode. You can change this mode before or after integration.You must test your payment gateway in test mode. 
How to Integrate Form with Square
As far as I see, your payment is completed. It should be nicer to reach Square support in this case.