This isn't the kind of impression we want you to have, @tfriye.
I want to make sure you can process a return on a credit card so you can get back to working order. I'd like to redirect you to the best support group available to get this addressed right away.
You'll need to reach out to our QuickBooks Payments Team to get in touch with the Risk Management department. I understand that you've contacted them before but they're the best support group that can help increase the limit.
You can also check out this article for another way of reaching out to our support team and its support hours: QuickBooks Desktop Support.
You might want to check out this: Void or refund transactions in QuickBooks Payments. This will guide you through the steps on how to void or refund transactions.
Our doors are always open to help you again if you have any other concerns or follow-up questions. Wishing you all the best, @tfriye.