Worst Possible Service

I have been trying for the past week to migrate my current mobile contract to the new unlimited data contract that Telkom mobile is offering. I have spent over 4 hours on the phone calling in to the call centre. Having to explain what i want every single time, clearly no one at the call centre makes notes of clients questions or concerns, I have been given the same response every time i call, that the person i am talking to cannot help and only managers have the codes to do migration of contracts, and I am promised each time that someone will contact me the next day, no one calls and it is up to me to contact them to ever hear from them. the service I have experienced is shocking and I would like to know why it seems as though it is Telkoms policy to have their employees lie to their clients. Do they believe that is a good way of doing business? I would also like an explanation why it has to be left to the customers to make contact? Clearly Telkom does not care whether it keeps clients or not. It is some of the worst service i have ever experienced in a long time.