Worst Telkom service ever

Telkom provides the worst services ever. I keep on calling them to inform them of the bad internet speed I am getting. The only advise the can give me is to have a technician come check out my line and to restart the router. A technician has been here twice and could not find any fault. When calling again I just get told the same thing. I should not have to continuously restart my router the router isn't even a year old. I am being sent an invoice on time every month that I pay in full without fail but I do not get what I am paying for. I pay for a 4mbps line but get 2mbps line speed if I am lucky, most of the time I struggle to get 1.5mbps even especially between 8-12pm. I do not pay Telkom to only use my internet from 1am - 8pm. Once again the worst service delivered ever. Worst mistake was opening a contract with Telkom, I even tried canceling but was informed I would be penalized. I want to leave Telkom because I am not getting what I am paying for.