POOR LTE ROUTER SPEED

Good day

I'm reporting this company on hellopeter. Ive taken out a 100mbps lte sim with router. I got my router on 17th August which was the Monday. Since Monday I've been getting slow speed mostly around 2mbps. I've spoken to multiple agents and all they do is just trouble shooting the issue. Ive put in a cancelation request as I'm working from home and also streaming which I cannot do at this moment due to the speed that's low. No one comes with proper solutions for this issue. I've been advised that the service will cancel on 1st Oct and I need to pay R999 for the cancelation. How can i be respinsible for cancelation cost when the issue is on the service provider side? I won't pay for the new month and I also won't pay the R999. Why do I need to pay for something that I'm not enjoying any benefit of?