Dissappointed in Cell C Centurion

On 12 December 2015 I did an upgrade at Cell C Centurion. Stefan assisted with the upgrade on a Samsung Galaxy J1. The upgrade was on an Epic 100 deal, which include a Smartdata 1 GB sim and you received 50 GB anytime data for 90 days. We didn't receive the 50GB. I contacted Stefan and he said that he will speak to his manager (Vineshnee) to correct this. No feedback. I went back to Cell C Centurion and I spoke to Stefan and Vineshnee, they told me that we need to cancel the data Sim card and redo the transaction. Stefan told me that I will not be charged for the Sim card that they cancelled (But Cell C charged me R264), and it was their mistake. We received the 50 GB, but only for the period 22 - 31 Dec 2015. I contacted Vineshnee again and she said that they will contact head office to correct this. No feedback. On 11 January 2016 I spoke to Vincent but still no solution. I contacted Vineshnee on 13 January 2016 to get this matter sorted, but she was very rude and not very helpful . On 15 January 2016 Vincent indicate that the 50 GB data has been corrected, and the account will still be corrected but up to now my account is still not corrected.