Pathetic Service

I have upgraded (renewed) my contract telephonically with David Louw on Thursday 16 July 2015. It used to be a MTN 500 anytime and it is now My Choice 350. I even asked to speak to his supervisor to give him a compliment!<br> Everything went well and I received the text that the new service has been activated.<br> This was until 5 minutes later when I received a text message to say I have exceeded my credit limit of R385.00 and my service will be suspended.<br> Nobody told me that this could happen. I phoned the pathetic call centre and I hold on for almost an hour to speak to a consultant.<br> During this time I couldn't make important phone calls which caused me to loose money.<br> I have send an e-mail to customer care at MTN, but I have received any form of explanation why this has happened. I really don't know why they call it Customer Care as customer service seems to be the last thing on their mind!<br> My reference number is UV629238 for the upgrade. On my e-mail I received a number #***6.<br> As I haven't received any feedback yet, I regard it as a bridge of contract. I have tried phoning again and again to cancel my upgrade and my contract but maybe these people are on STRIKE again.