Unexplained charges on statement

The service that I received from the edgars call center agents is worse than terrible. I enquired about items appearing on my statement that I did not subscribe to and all I get from them is that only head office knows and they will get someone to call me. I have been waiting since June to the call. I have called and sent emails but get no response yet the balance on the account keeps increasing. I was owing just over R1 600 in May and now the balance is just over R3000 because of interest.

All they do is send threatening sms's and letters but never respond to my queries.