Canellation of a contract

Hello Peter<br> <br> Honestly i don't even know where to begin. i'm really frustrated and disappointed by Mtns' operations. I've really tried with all my might to resolve my case but I've exhausted everything. i'm trying to cancel a new contract because the phone that i received was faulty, I've left countless messages for them to contact me and with the assistance of John (MTN Maponya Mall) we've sent emails just to track the inquiry. to date no feedback has been given by anyone the only response we've received is the matter has been escalated. My problem is MTN wants to debit my account an amount of +- R1700 without any explanation or clarity. this is really causing me stress and i'm unable to deal with this matter. i'm pleading with MTN to just respond with feedback.