False accusations from representative

I hired a car last week Wednesday (29/11) and the car was delivered at Brooklyn Motor labs. Today was the return day (7/12). When I arrived at 9am, there was no representative from Europcar to collect the car, so I phoned and arranged with them to pick up the car. The representative said I can just leave the keys there and they will come and collect.

I received a phone call about an hour and half later where the representative accused me of changing the car's tires??? Which I did not.. I return the car as I received it last Wednesday and also filled up the car which I have proof of as well. He them claimed, they will have a look at the offices.

Now, how can false accusations just be made before double checking?? Or is someone trying to make up stories to keep my deposit??? Very disappointed with the service.

If I do not receive my refund within the 10 days stipulation on the contract, I will take this further!