terrible service/no follow-up of complaint

Tshepiso loaded the incorrect contract at the time of my upgrade. As a result (2 months later!)n I'm am still trying to fix this mess up caused by a rather distracted salesperson. My contract billing should have been @ R139pm but it is sitting at R320pm due to this useless person! I have also wasted my own money and fuel by continually calling and also on a few occasions visiting the store since they do not keep to there word of calling me back with an update on the issue. It also seems that the manager covers up for Tshepiso, who is rarely available to entertain my calls. This is disgusting behaviour from a service provider and I do hope that a senior mtn official will deal with this matter as I have noticed that this is not the only complaint about this store and their staff. Tshepiso also confidently stated that she will pay the difference out of her own pocket if there was any problems during the upgrade- but of course I cannot get a hold of her whenever I call there!