NOT PAYING OUT DEPOSITS

Hi I rented property for a year which electricity and water supply was managed by @ease property and as per contract the deposits will be paid out after 30days when the account is fully paid or they will use the deposit money. I mailed my disconnection letter already the 3rd of November 2014 and moved out on the 2nd of November 2014 my account was fully paid up on the 5th of January 2015. To date I have received accounts for monthly usage even though I moved out already and the water usage is by the current tenant. I have been mailing and calling them continuously to rectify this and requesting my deposits but with no avail. They make promises every day that the payment will be made today for more than a week now. If R1640 is a lot of money these days for anybody. I'm really disappointed in there services and the lies I've been told.