Bad Service

I have had this issue since last year, they called me to install dash camera. I told them I don't have money at the moment I will call them when I'm ready, either way a gentleman was sent to install it even after telling them that no I don't want it. The calls are recorded as they say but I have not received any feedback because I did not agree to anything,yet they are pilling up my bill. It's a struggle everyday there's no way forward as how can I pay for something that I did not agree with. I don't even have a ticket number no one is assisting me with this. This is very unfair and the accounts department calls everyday when I tell them about the issue they will want to transfer me to another department same thing everyday but there's no resolution. This started last year in September