MTN TERRIBLE SERVICE!!!!

After posting on here 3 times prior to this, I still have no response from MTN. The complaint gets a generic response that the matter is getting investigated and I hear nothing. Even Samsung has now honoured their side of the contract by giving me my monitor, But MTN hasn't even had the audacity to contact me. You have falsely advertised your contract, I want my promotional data, the contract clearly stipulated (and I have a photo of this promotion in your store) that I would receive 30gb in the first month and 14gb each month after that for 12 months. I want my data!!! You are quick to take your monthly instalment but you can't give me what I paid for!! This has been carrying on since Black Friday Last year, I don't care if the contract wasn't done properly in store and if your consultants or managers don't know what they are doing, I want what I paid for!! I am losing my patience now, I am going to get this contract cancelled legally if this is not sorted out soon, you have breached the terms of the contract!