Did not receive data bundle as agreed

I've upgraded my second MTN contract on 27 June 2015, specifically going to add a data bundle which was not added as requested. This resulted in my bill for July 2015 being R737.92 more than what it would have been if the data bundle was activated as requested.<br> <br> My wife have been following up with the store since August 2015, trying to reach the manager or person that assisted us on the day the upgrade was done without much luck. In an email conversation with the person that helped we were made to be the guilty party in this matter as we should have made sure what we asked for was loaded onto our account.<br> <br> I've been an MTN customer for more than 11 years and have been happy with their service, but right now they do not appear to acknowledge their mistake, even after contacted them by email through their complaints department.<br> <br> If this matter is not resolved, I will move to another service provider, which I would prefer not to do.