SONY M5 DUAL FAULTY DEVICE

I am not happy with the Sony M5 received . A brand new device sent in for repairs which took 3 weeks to fix. I received it back and although 1 problem(SWITCHES OFF) seems to be sorted (too soon to tell) the phone still OVERHEATS REALLY BADLY TO A POINT WHERE YOU CANT EVEN HOLD IT .The phone was returned with light scratches on the screen and indent marks on top of phone.I feel this is unacceptable. I would like a new device and I would like to change the device completely. No one can assist me in replacing this device.I have been without a phone for 3 weeks and now I have to return it again and this could take anything from 7-21 days. (Booked for collection) I am paying for a device I have not been able to use. Sitting without a proper phone for work is a real inconvenience for me.I would appreciate it if this matter is taken seriously.As I am aware that this is a Sony Problem as people are experiencing the same problem worldwide I don't like how c has handled it. I feel Cell C should have sent it back to your supplier as the entire batch is faulty.In the event that it was sent out a replacement device should have been recommended as you are well aware of the problem