Non refusal to refund the deposit paid on cancelled reservations

Booking Ref; *** On the 29th October 2021, we hired a care online and on arrival to collect the car we had to cancel due to the type of card that we were using. Now that the car has been cancelling, the refunding part is a problem as we are now directed to the rental.com for refund and we are being told that they were never made aware that the car was not collected.

The question here is, if we cancel at Thrifty in East London Airport, how does your systems work? The same one that was used to reserve the car, is now saying that it cannot communicate to rental cars and you are both refusing to pay our deposit.

Is this not some sort of a day light *******?

We have booked cars before through Avis and we never had such kind of experience and even on that day, we ended up using Avis because of your poor services.