I need the contract cancelled and my mtn back to normal and I still need my 129r of data

I complained weeks ago about what they did and asking for a refund they said they won't refund me my 129r data from mtn. They will cancell the contract within 7days I think now its more than 14days no contract was cancelled with tfg as we speak I can't even buy myself WhatsApp data to join my sons group because I'm still with their contract they said they will cancel I had to buy just 1 hour data from mtn momo.. I can't keep buying data every hour to access my sons school group . I tried calling them right now the lady was rude to me but I become as calm as I can and since she said she's checking I was 4minutes on the line until my airtime got finished without any help.... I'm still saying I need my 129r data that I used to get daily data of 300mb everyday and I want my mtn numbers back to normal... Hello peter please help I think iv been taken advantage of because I'm black.. They are always rude to me and not taking me seriously cause nothing has changed since iv been waiting for weeks