Disgusted!

So there was a mistake with my MTN monthly bill where I was debited twice. I have been calling MTN for over a week now and it has been the most frustrating experience. First, they let me wait on the line for over 15 minutes while trying to 'access their banking profile', only to tell me that somehow their system was down and that she is unable to log the call and that I have to phone back in a couple of hours. I then phoned back a couple of days later and I was then told that somehow the query was logged and that in a couple of days the issue should be resolved. However, very strangely, I never received an SMS to confirm that. I have now phoned again to follow up on the query and this time, I am being told that somehow the query was incorrectly logged and that I have to wait for 30 DAYS to get the issue resolved. And the most frustrating thing is that everytime none of the agents is able to tell me what is the issue with the query. This follows up an incident where a couple of months back I went into the MTN store in Morningside to have them make me a dual SIM card on my same contract number. The agent assured me that he could assist, charged me about R200 and gave a SIM card he said would be active after 48 hours. To this day that SIM card never became active. And when I went back to query this, another agent told me that they do not do dual SIM cards for contract customers and that the card that was given to me was blank and in no way linked to my number in their system. So essentially they just took the money off me for nothing. I am truly disappointed with the service, every time I have had a query and this really makes think whether as a customer I should continue with MTN. I certainly will not be recommending anyone to use their services. Disgusted!