Damaged Sony Xperia

When I received my new phone, Sony Xperia m5 Dual, I immediately phoned them and told them that the phone does not read memory cards, even though I followed the instructions. <br> There after I phoned the customer Care center 11 more times, to complain about the fact that the phone overheats, to the point where you cannot touch it. It also switches itself off, with no warning and the only way to switch it back on is to connect it to the charger. My contract is not even 3 months old. <br> <br> I am insulted that this is how my customer experience is with CELL C after i moved from my SP that I have been using for 10 years. This after I now have two contracts with them, and get no joy whatsoever.