New FAULTY S6 Edge not being replaced/repaired

Started a SmartM contract mid April for a Samsung S6 Edge. Phone was working fine for the first couple of weeks (battery ok, phone connecting to LTE network). However one morning I noted that phone's battery was dead, after charging it throughout the night. After charging it again, the battery started dropping drastically fast, also with limited usage of the phone (for example a 2 minute call), the phone started getting so hot that it actually burns my hand, also was no longer connecting to LTE network, just HSDPA Plus. Wasn't able to use the phone because of the overheating so booked it in for repairs at Vodacom Repairs Alberton. I have to date sent the phone in 3 times now, and they keep on coming back with \No fault found"after the phone was sent through to the \""Advanced Repair Centre\"". Tested it in the repairs shop with a technician"