Bad service from Avis car rental

I have experienced the most horrible experience from Avis Sunninghill when it comes to holding deposit I am renting a car with Avis there is a holiding deposit that they hold at the beginning of Rental which is payable at the end of the contract which in my case is after 30 days. At the end of the contract at the end of the contract my deposit was not paid into my account. I extended the contract by a month I was expecting my deposit to be paid back that was not done after a week I went to enquire with them one of the agent told me she sent the email the money should be released immediately few days later the money is still not released I went back again I spoke to a certain gentlen who also sent an email and said the money should be in anytime no money was deposited I followed up and he told me that he sent the email is for the bank to release the money I called the bank they said they can't help me they haven't got authorisation from avis. 15 days later my money is still not released telephonically is almost impossible to get hold of Avis they never answer the phone if they do and is not the person who assisted you they will just say the person who assisted you will call you back which they never call back. Avis as it is right now is ********ly holding my money and there is no accountability. If you need a piece of mind stay away from Avis otherwise you will be frustrated when you need your deposit. They will keep your holding deposit at the end of the month they will debit the monthly rental amount if they keep R9200 like in my case at the end of the month they will be taking R5000 and you will not even get your holding deposit in due time you will have R14000 out of your account that you dint even bugget for