Took forever to activate my fibre and being billed for not using service

I app**** for fibre in March 2020 because I needed the fiber for level 5 lockdown.The fiber was only activated in September 2020 and I could not cancel the service and also I moved out of the apartment I was staying at so I was being billed for nothing.I now owe them close to R2000 for not even using their service because they took forever to activate my service