Inefficient Call Centre Agents

I recently requested to cancel, having spoken the "Retentions Team", I was convinced to stay on as a customer and take out a new package. The Retentions agent (Thami) **** about the cost of the package, and to my amazement I was charged almost double of what I was supposed to pay. I have made over 10 calls to the call center only to be transferred from one department to another, no one helps. They make false promises, or point blank tell me that they don't know what to do. No sense of urgency, no commitment to their jobs, completely unprofessional. The MTN Direct store in Chatsworth Durban was of no help either. MTN is one of the most expensive networks, I have used the service for over 10 years now and always stayed as a loyal customer but I no longer want to associate myself with a company that lies, cheats and *****s from their customers.