Extremely poor customer service

Worst customer service ever. Signedup for a sim only contract for 100gb data. First month I received less than 30GB. When I complain was told its pro-rata and full data will start the next month. The next month same thing happen, I tried to complain but no once is assisting me. Tried to get to them through Facebook but they can't assist. Phone calls is even worse, spend hours without any assistance. My request is very simple, they must give me full 100gb data or cancel my contract with immediate effect. They say I must pay for a cancelation fee. Why? Because it's not like I'm doing an early cancelation, I want full data loaded if they can't deliver that then they should just cancel. I don't see why I must pay for their failure to deliver.

They take so long to respond to my queries and when they do they just ask the same thing over and over again. They are not willing to give me full data and also not willing to cancel unless I pay cancelation fee.

The contract is uptodate, but Have never received full data as per advert.

I have been ****med and can't allow this to continue. I have allowed them to debit full payments but won't allow them again. Never. I never thought a reputable company like MTN can **** me like this. I regret.