Useless is an understatement

So its almost a year and there is no one at MTN that can help me. I did an upgrade trough MTN direct they told me what i am going to get on an certain contract. When the first month came i got mich less data that they told me and i pay more than they have told me over the phone. I put in the one complaint after the other. I asked for the voice recording and still nothing. I came and left an complaint on Hello Peter, then they email you asked your id number and tell you they will sort it out. And then you hear nothing of them they ignore your emails. What more can i do?