poor service

I have had endless issues since I upgraded my contract in December .. I was charged a large amount in january which they added extra costs that I never purchased first of all... I had complained about it and they credited extra back to me and paid amount remaining and was further charged accordingly only to get an sms telling me I have breached my contract and have put me through to some debt place? I am very angry that I have to deal with all these issues that telkom has the inability to rectify.... If no one contacts me to sort this out this will be taken further as I don't feel I should suffer for someone else's mistakes because they don't know how to do their job.