Constant low speed and weak service

For the last two weeks I have been struggling with Extreame low speeds. Wiru links service And staff is friendly, but the fact is that they are not sorting out my low speed. At times I have no internet at all. I am paying for a 15mbps line and not receiving it. Then its up then it’s down. My opinion is that they are throttling the $&:t out of my line. They keep on asking me idiotic task and questions(in my opinion this is to put the ball in my court instead of addressing the issue). I understand that they have to ask, but now they are asking the same thing in deferent manners and two weeks later still have the same issue. I have told them that I am open for options in terms of moving to a different package, moving to fibre or any service they can recommend or offer, but they refuse, this means they are not prepared to assist. I have a feeling this is going to be a long two years before I can move to an trusted service provider that is not going to take R18000pa without service. Make sure of your facts before signing yourself up, from my side, I would not recommend wirulink at ALL