Proccessed incorrect amount on credit card

If the transaction is in the open batch /Void ( press F4) select void follow the prompts. If the transaction was already settled/ closed batch. you must do a return/refund (press F2)
note: Refund/return does not go thru to the card Issuing bank until the batch his settled.

Hi Dear,
you can contact with your bank to solve your problem and you can also try juniper credit card with many security features and low processing fees.

Best of luck

If you catch the error right after you run it, do a void rather than a credit. A credit could takes weeks to show up for a customer and they won't be happy with you.