Bad Internet service provider

I have had issues with dropping wifi/internet line speed at my residence where I work from home. I have communicated and requested assistance from the ISP-Bridgenet, the technician was unable to find the root cause on multiple visits and only made small setting adjustment which did not help. I requested for a new router to cancel out the possibility of it being faulty. I waited 2 weeks for a response as to what the cost would be, in the first 4 days of waiting for feedback, I decided to cancel the services with the ISP, 5 days into the new month and requested to cancel end of that month. Contract stated a full calendar month notice. I requested to pay a pro-rata for those five days due to the poor service and customer relations.

I now need to pay the ISP and the ISP. Bridgenet is warning me of a possible handover due to non payment yet they are the ones rendering a poor service.

They are not open to resolve poor connections and assisting their customers with a stable and reliable connection.