I normally buy a weekly bundle of 2GB for R29 and when I tried to buy last week it now costs R79???? How is that even right??? I have been singing their praises for years but this is ridiculous

I normally buy a weekly bundle of 2GB for R29 and when I tried to buy last week it now costs R79???? How is that even right??? I have been singing their praises for years but this is ridiculous. How do you increase the price to over 100%? Can someone from MTN please explain this?