LTE light 80 G changes

I have been with webafrica for about a year, I did have some upload speed problems that could not be resolved. But it is better now. I am paying R499 for 80 G +80 G for LTE. Now I noticed that they are giving 90 G for the same price. They did not notify me of the changes and offer me this. So unfair, I feel ****** and cheated.