Vodacom fibre

Vodacom fibre can't assist with my internet after it whent off at 8pm. After phoning them they were no help at solving my problem and keep on saying the problem are ons my side. The were no problem with my old router, but they insist i have to use the new router. Sins i started to use the new router, my internet keep going off and on. They can't give me a time or date that the problem will be fixed, but i have to pay for this service