Poor Internet service

Am very disappointed with Vodacom fiber. The internet hasn't been working since 3rd December 2022. I reported this but no help. I again reported on 20th December 2022 still help. I was given this reference number SR***. We use the internet to work from him. And I have been buying date for prepaid number. While I pay Vodacom for fiber internet. Last year in August I wanted to cancel the service because they made a mistake when I was upgrading they but I details for all the new clients. I was receiving all emails, phone calls and sms for installation. They even promised me a new router. But nothing was delivered. I complained about the Vumatel box which is put in my child's bedroom to be moved after relocating but they wanted me to pay Vumatel +-1700 Rand which I did not have.

I do not know who talk to anymore because I phone Vodacom and they promise to send someone to come and check but no one came.

I now want to cancel the service but am scared of cancelation fee and it's not my fault that the service is poor. How am I supposed to work.

Kindly help me.