Depost not paid in almost a month

We hired a car at East London airport first weekend of June. After we returned it we got a call from Europcar enquiring about a dent on the car, which we knew nothing about, and that our deposit would be with held. The next day we got a call from them confirming that the dent was on the car before we hired it as per their inspection card and that our deposit would be paid. Long story short....money still not paid and we have been sent from pillar to post on our deposit. No accountabilty what so ever and claims of bogus investigations yet we were cleared of the dent.