Vodacom fiber misleading me as a customer

I have a contract with vodacom fiber. The router started giving problems and I reported it numerous times and requested that the router needs to be replaced but I was always informed that it's only software. It was suggested that I renew the contract to receive a new router which I did and now I am suddenly required to pay for the router in excess of R2000 becausemy oldrouteris outof warranty. This was never mentioned during the renewal process. Vodacom fiber refused to listen to the previous recorded phone calls.