MTN Warranty Assessment round 2!

This follows my earlier review of this company. Renewed my contract 19/08/18. Upgraded to a Samsung A6. After about 10 days, experienced a problem with the phone - callers not able to hear me. Took phone back to store where upgrade was done - was told to take phone to another MTN store. New MTN store agreed that there was a problem with the phone and advised to book the phone in for a warranty assessment. Finally after 3 plus weeks and complaining on Hello Peter, was contacted to say that I could collect the phone and that there was nothing wrong with the phone. Went to collect the phone and asked to check that it was indeed sorted and the problem corrected!! Hell no, problem still existed and "new" phone got booked in again! MTN - I updated my contract. I do not have a new phone as promised with my contract upgrade! !!!!