Telkom and Vumatel is not a good combination

I have app**** to have Fibre internet installed at my home. Now the technicians came and did the installation and when they completed their job, I requested my wife to ask them just to configure the new router since I was out of town. The technician blatantly told my wife that its not their job, their job is to installed the line and that is where it stops for them. Okay now I sit with router and a fibre line which I can't use because I am not trained to do the configuration what is required. Then I requested telkom to rather cancel the fibre contract since I will rather use my DSL Line which is more reliable and it is working properly. Now this is over two weeks of struggling, phone call after phone call and I am still in the same position. I don't want the router or the fibre anymore. I called the sales department and the options to select which I was given by an agent does not exist. So a recorded voice gave me a email address, then I sent an email to this address and still no response after 48 hours. What should I do to cancel the fibre and for them to collect their router?