"It's customers bank charging....it's not ours."

You need to decide if you want to accept payment like this or not. Then, you need to decide if you want to charge the customer a Processing Fee if they pay by wire. Some States allow you to charge the customer the fee for payment you process by credit card and some don't allow it. You consider your Rates, as well. Banking fees are part of overhead; if you are bleeding small amounts due to banking fees, you address that issue any number of ways that will resolve it for your operational needs.

Example: I got paid for a project, payment from Lichtenstein. The amounts were large, and the wire fee was a % and was large enough that I did not intend to Absorb it. But of course, I wanted to Keep Working with these people for their large US project. So, we discussed them moving funds to their own US bank account, first.