Billing for no product/ service

I have had my contract since Aug2014. Within 5 months the phone already had issues and i sent it back to branch for repairs in Feb2015. To my surprice the phone came back with no battery and nobody could explain. I did not take the phone and decided to go back in april and the phone still had no battery. Out of my own pocket i bought a battery for the phone so i could have a phone only to realise that the phone still has problems. <br> Since February i hv been billed for a product i do not have and its not even the amount we agreed on in the contract. I have had no joy in the branch visits in Ellisrus branch which cost me time and money. The consultant i have been dealing with ( Leah) is not helping at all and i have been given the run around in seeing the manager. <br> <br> This is absolutely no servive i am paying for. I am being deprived of my rights as a client.