How to record a supplier credit card refund of excess deposit?

1. Here is the scenario, we had an event in the fall, for example in October, and we reserved rooms for the event at a hotel.  To secure the reservation, we had to provide a deposit by credit card.  As it turns out the deposit was larger than the final invoice, so we received a refund of the unused deposit back to our credit card. 

1) We pay a deposit of say $35,000 to the hotel in September by credit card
This is recorded as a bill payment

2) We get the final invoice, for $32,500 from the hotel.  We enter the bill, and apply the payment from #1 to the bill.  This leaves a balance of $2,500 on the supplier account in QBO.

3) We get a refund to our credit card for $2,500 in October, following the final invoice.

I've tried using a "credit card credit", but this is not appropriate as nothing is being returned. What is the correct way to match the credit card transaction, and bring the supplier account to $0?