Has anyone had problems getting their money refunded by The Music Room?

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. 

Best we can do is speculate.  Resolving requires @tubes21 (the only with the authority) to contact both TMR and his bank to clear up the payment processing problem.  Otherwise maybe work out another method of receiving payment.

I have returned two high priced items to TMR. The money was in my account within two days of them receiving the products both times. No issues at all.

I sold an amp to TMR, the money was in my account within 2 days as they checked it out first.  

No problems, just returned unused cables.