Avis with holding money

Its been a really bad experience with Avis, I returned the car after I was done with the rental, Avis then debited my account. For Etoll charges, then I had the same amount debited again, I called customer care and 1 transaction was reversed! A week later I again was debited another amount! I called costomer care and I was informed that an amount on my account was reserved by Avis and that they will release that amount back to me to with in 24 hours to square this up again. A week later I called customer care again and I was told that it has been released ill get the funds in 24!hours. I still have not received my money !!!!! I live on a tight budget and Avis is playing games with my money!!!!