MTN - zero solution to getting extra data on contract

I have been with MTN for 20 plus years and only to find that the minute I need extra DATA i am unable to pay and add to my existing contract. The call center initially said purchase via the app, and its not available. I called the call center again advising same and told that TUFF LUCK , i can only add data on when my contract ends in 3 months. Well i cant wait till Dec and will be moving service providers. For someone who is willing to pay and add on data, to be told , sorry you have to wait 3 months. Disgusted in zero solution offered by MTN.