No communication with MTN

Why is it that a company who's business is communications cannot be communicated with? For 2 days I have tried to contact MTN on their support number, never any answer. I then tried to call any number of MTN stores and received no answers often being disconnected about 4 rings. This is not my first experience of not being able to talk to MTN. I went to the local mall only to find the only closed store was MTN because of load shedding. In desperation I call a Vodacom shop and got a reply first call I made. I have been an MTN customer since 1994 but I have reached my limit.