Marketing strategy

I purchased a Black Friday promotional contract, this was R299 per Month for 50GB, 10 gb night express and 10 data bundle with 30 GB anytime which is 50GB in total: plus 3 month free subscription to show max. In December I only received pro-Rata, Jan 2018 I only received 20gb in total I went to the store I initially purchased this contract , they told me I will receive a message from MTN to load the Show max, nothing till today. I called so many times to the call centre and also send emails to the customer service department, they haven't solved this problem to date. The customer service cannot give you a positive answer all they can say is that they will esculate the query to the correct department, that loads the data. I went back to MTN trade route and they have also e-mailed the head office and haven't heard from them since 2 weeks ago. This is so frustrating they have just **** to client using this as a marketing strategy. How can it take so long to so,be this data problem and show max voucher. apparently I'm not the only person that is sitting with this same problem. I cancel my another contract thinking that this was a great deal but the more I think about it , was a huge hoax. I'm now bound to the contract and where does my consumer right kick in. MTN where is your Boza network hahahah