Internet throttling

When i originally apply for telkom internet not one of the representatives told me about my line will be throttle if you reach a 100gb data and they can listen to the telephone call recording. And still they throttle the line and every single time they throttle the line i have problems afterwards with my speed i am sick of calling them because every time you speek to someone different and you have explain everything again you know the problem is the after sale services and because you are a single person who's complaining and they don't worry if you get a new internet provider but i will take this matter further