UNACCEPTABLE CUSTOMER SERVICE

VERY UNHAPPY customer... I went to MTN in Canal Walk which is a walk-in store, to open an application for a Tablet ( which they ordered from the Waterfront branch, so I was told, as they have no tablets in stock) a week and 2 days ago to be exact, I still have absolutely no idea where the tablet is or what is going on as I am getting no information from the person who is in-charge of the application, secondly, I went for a number change on Thursday 6 December paid R 250.00 for it, was told it takes 24-48 hours, it's Monday and I am still waiting. The customer service is absolutely unacceptable, The telephone only rings, there is NO ANSWER when you phone, My bf has even contacted the Manager about this and NOTHING has been or is being done. Tired of the lack of service , this is totally unacceptable!!!!!!