Not quite understanding what you’re saying. What was your original method of payment? As for money coming back your way, it’s going to come back in a form of credit to your credit card if you used that, actual paper check, ACH or wire. Wire being rarely used under these situations.
My interactions TMR buying and selling have always been above board. Zero complaints.
As @ckr1969 said, call them. My guess is there is some miscommunication or misunderstanding either in payment method or issue with your transaction not related to payment.