Useless MTN

My wife and I recently took out contracts with MTN. We both took the new Hisense H30 with the advice of the sales agent. The first month everything work fine and then the problems started arising. A list that is too long to mention. After contacting MTN to find a solution I was referred to the Hisense rep. His solution is to do a software update to resolve the problem. I software update that I have always gone religiously with all my previous devices. When finding out about booking the phone in for a warranty assessment I was told it would take a month for a decision to be reached. If the device gets replaced and the same issues persist we will have to book it in for another month and that's how the cycle will continue until the end of time. MTN has a bad reputation for not assisting with faulty devices. Our phones are not even 6 months old yet we struggle to get anything done or even get some proper feedback. My patience is wearing very thin with MTN and with Hisense. I advise all those that interested in taking a contract with MTN to stay far far away and stay even further away from Hisense as their staff are utterly ***********.