Deposit not being returned

I rented a car from AVIS/Budget on Friday the 29th of June 2015. The car was returned on Sunday the 31st of June in perfect order. I was told it would take 3 days to refund my deposit however I have not revived my deposit or any communication explaining why my money has been held for so long. <br> <br> When I phoned AVIS/Budget customer services I get a stranded scripted response that it is a automatic process and that they cannot do anything. I have found that AVIS/Budget do not care about there customers.