Worst service and bad attitude ....lack of accountability

On the 8th of July I booked my S7 in at the east rand mall mtn branch. The service consultant had me complete a form, booked my phone in and told me their customer promise for repairs is 21 working days. She circled a number I could phone to follow up within the 21 working days. On the 24th working day I phoned the number...gave the the MEI number. They had no record of my phone, was of no assistance to try and allocate my phone and told me to go back to the branch. I had to take leave to go to the branch after I tried for days to get ahold of the branch. It was so bad I phoned another branch who had to go to this branch for th to answer the phones and call me back. David the store manager finally allocated my phone on the 15th of August. It never left the store. ..yet I have been paying an mtn account for a phone I do not have...!!!!!!! The phoned was curried on the 15th...The manager David had a no care bad attitude unwilling to help me. I insist on my account being credited for 2 months at least. I still don't have my phone. The manager does not answer their phones, he has not phoned me back or given me feedback. This is the worst service I have ever received. I have had my mtn cell phone account and number since the age of 12...I have been a loyal client for 17 years. I have not paid my mtn account this month...I don't see why 8 have to pay for a phone I do not have....u acceptable