Disgusting customer service Mall of the South

Goodday. I am so dissapointed with MTN Mall of the South customer services.I took a contract top up and was assisted by Micalia Steven.I told her I want a top up when I have reached my call limit which was set to be R239..To my suprise they have debited R1494.16..I went to the shop to find out what was going on..The manager called Micalia and she did admit that she didnt expalin it to me.I want my line to go back to R239 and also I want an itemised billing to see where does the rest of the money come from.I am so dissapointed in the rudness and uncaring manner.To the others please avoid MTN Mall of the South.My line is ***