Appauling service at MTN Cavendish

The MTN store at Cavendish mall is appalling. Firstly they do not answer their telephone ever. When asked why they do not answer they sttate that the phone is in the back and nobody sits there. Why the heck bother to have a phone there is no intention to answer it? Why is a company based on telephone communication unable to be reached telephonically? Then I took my phone in for repairs and after the exceeded waiting time I went back to check where it is... they found it still sitting at the back of their shop. Then after the next exceeded period I went back as the repair centre says it has never been logged on the system. The guy at the store cannot find it and said he thinks it is in the truck. A few days later after phoning the repair shop again they say that it is still not logged on the system. So now after 5 weeks my phone is uncounted for, not repaired and I cannot speak with the MTN shop and need to drive there each time I want to ask something. I have never complained about a service before but this shop has pushed passed the threshold of what I am willing to tolerate. Be very careful when dealing with this shop.