I sold my readers to another company and notified ...

I sold my readers to another company and notified USA Tech prior to the transaction, this was in April 2019. It's now November 27 and I'm still receiving the service charges instead of the current Device owner. Phone calls to customer service go unanswered. My USA Tech rep, Tracy DeZarate has stated by email she's taking care of it, after numerous followups nothing has been resolved. USA Tech is great at taking your money. Not great at anything else. I recommend you find another merchant services company.