Rude and poor service

I'm fed up with Telkom. A consultant from Telkom Mondo called me and offered a router. A router was delivered after 5 weeks. Only to find that the router was faulty. I phone both Mondo and Telkom they say I must go to the shop. All shops are telling me that the router is faulty I need to cancel the contract with Mondo or Telkom. Both Mondo and Telkom keep blaming each other yet their collections department keeps calling that I'm owing. If ask them to cancel because I never use their services, they say it not their fault that my router is faulty. Telkom is telling me to pay for the whole contract and cancel because it also not their fault that their router is faulty they don't build router they outsource the router if I have a problem I must go to court.