2 months and still no phone

I was contacted by MTN on Friday the 6th of February after my previous complaint on HelloPeter. MTN head office promised me my cellphone will be delivered on Monday the 9th. I phoned the shop today and still no phone, I have repeatedly phoned and asked for my phone to no avail. Every time there is some delay or excuse about why my phone is not there. MTN Malmesbury has received 2 brand new Sony Xperia Z3's. I have started to ask them for a new handset instead of the repaired one because it is taking so long. I have already paid the R5400 repair cost, even though the MTN shop told me it would only cost R1500 to R2500. This is the worst service I have ever received. No one wants to help and just refers you to someone else. The manager of MTN Malmesbury is never in the shop and never available. I keep being told to phone her but she never answers. I am disgusted with the way that MTN treats it's customers. Head office MTN and the region manager both promised me that this would be resolved, but like always, empty promises.