*********** and unsatisfactory repair service

Phone has been in for repairs for 4 times in the last 2 months.Phone overheats to point where it shuts down automatically. Vodacom did 2 software updates to try and solve the problem and some repairs were done. Phone still has the same problem.Requested replacement unit as not satisfied with this device and the repairs that was done. The unit is still within the 6 months warranty period. Vodacom doesn't check that phone was properly repaired and that problem is fixed. It's been 2 months without phone whilst still paying for a unit I can't use. On last booking Vodacom requested replacement unit and contacted me today to merely inform me to collect the old unit with more repairs done. I am not satisfied with the unit or the repair service and am inconvenienced by driving back and forth simply to return unit with same problem and having to pay for it. Management informed me today that they will send it in again and escalate it - this was suppose to happen the last time. Phone needs to be replaced ASAP!!!!!! Not excepting the old unit back as it clearly is defective.