Router wi fi problem

I have a router from 36 month contract which end in May 2023. I then took a new 36 months contract, Vodacom didn't change router. Now this old router is giving me problems. I have log a complain beginning of August 2023. They gave me their SR internal number and close without fixing my problem. They gave me another one, still l am waiting for them as l am still experiencing the same problem. This is not the Vodacom l know, so unprofessional, not reliable. Now l don't who to talk to as l am not feeling valued as a customer. I am also so exhausted to call them