Account limit exceeded

On 18 February 2015 I phoned Vodacom to have a limit put on one of my accounts which were charged almost four times in excess of the standard package per month due to 'data usage'. <br> On 18 March 2015 I was billed and debited R8 500 in excess of my limit. After numerous calls and endless hours I was told by the consultant that the matte will go through an internal investigation as to why the account limit was not put on the account and that Vodacom would refund my the money. Numerous calls later to enquire as to progress I could get no answer. On the 18th of April I was billed R1 500 in excess of my account limit AGAIN. After seven calls and explaining the whole story from the beginning to seven different consultants I still do not have an answer, only that 'the back office' has been asked to contact me, which has not happened and it was confirmed that there still is NO LIMIT ACTIVATED ON MY ACCOUNT. I am still eagerly awaiting any contact from Vodacom regarding this matter in terms of progress of the investigation and my refund. I had to replace the R8 500 taken from my account (in excess) with funds from my credit card which is now incurring interest daily for two months now.