Contract upgrade never actioned

I was at Vodacom store Kollanade on 24 January 2016 and I've upgraded my 3G data card number 08.....306 from 2GB to 5GB for R299 per month. In February my account was over R3000 and when I phoned the customer centre they advised that he upgrade was on the system but never implemented. They have said that this will be sorted (phoned on 1 March.<br> <br> When I went to the store on the 30th March 2016 to query my account, this was still not done. My outstanding amount if over R7000 this month and the upgrade was still not done.<br> <br> I am not happy with the way that the upgrade was dealt with and the fact that no one in store and in the customer call centre is willing to assist. I'm expecting Vodacom to pay back my money for the usage of data on this contract that I paid more than R299 but no one wants to take ownership of the problem.<br> <br> Please note that I have been a customer for over 20 years with Vodacom, and have never experienced such a problem, but for the first time this is really a nightmare to get someone to assist me. I feel that Vodacom has not taken any responsibility for this mistake and I feel that the manner in which they deal with this complaint is not acceptable