CELL C, happy to take your money and not give services paid for

I took delivery of a Huawei mate book and router deal through cell c direct just before Christmas. The router did not work and currently still doesn’t work since I took delivery. Sim was activated and still didn’t work it’s been almost 2 months and no solution. Yet very happy to debit me on time. Through the call centre to technical I’ve had many calls and many transfers of calls, one person suggested I pay for my own sim swop as the technical department said there was an issue with the sim and a security profile wasn’t activated. I am absolutely not paying this month for that and will be dropping the matebook and router off by a cell c branch today if not sorted out. To top this all off I get no callbacks to sort out the issue yet you will call me and try sell me more data when the current bundle isn’t working. Who runs this circus?