Service consultants cannot do their job correctly

When I took out a new data contract, the sales consultant at the MTN owned store informed me that the system is just off line, but my request for a R1 limit would be activated within 24 hours. Much to my surprise, three months later I get billed an ekstra R554. When I queried at the store, they informed me it is there fault and it would be credited to my account. Now, 5 months later, after numerous call from myself, MTN informs me I only changed the billing limit after the fact and I will not receive my funds back. I have been a loyal MTN customer from 1994 and have had more than 5 contracts simultaneously, but that in todays world does not count for anything. I have been canceling my contracts as they reach there expiry dates and will continue doing so. Mtn is in my view the worse cell phone company in Africa. Every time I speak to one of their consultants, they just blame the previous one, what they don't realise is that all of them, with their sweet voices still talks the same nonsense. I am truly disappointed.