Telkom Za complaint

Application for an ADSL wifi deal Called telkom on the 5th of June to apply for the above mentioned deal and was successful but had to make an additional R700 payment whic i did the very same day due to the fact that my credit score is low. As from the 10th of june i have called the call centre non stop without any success, each time i called the consultant just took my details stating that someone would call me and im still awaiting that calls today as i did call the callcentre like 74times.... I received the following messages everytime i call the callcentre: Telkom SA: Dear Customer, to enable us to process with your service installation a deposit of R700 is required to be paid within 7days on BAN number ######. I have seen many reviews of complaints after i have made the payment! Where should i take this matter cause i want my money back??