Thanks for posting in the Community. I want to make sure you get the answers you need with your Merchant Services fees.
Checking our updated fees for rejected payments in the Merchant Services Center requires a call to our QuickBooks Payments Support. For security reasons, we need to access your Payments account which we can't do in this public forum.
Our Support Team has the tools to view your account with us and can provide in-depth details about your fees and billing details. Here's how to contact us: How to contact QuickBooks Payments?