Jenny internet bad service.

We have been with jenny internet for over 2 years. Most of the times our internet connection are fine. But every time when there is a power failure or a storm and the towers went of we are struggeling to get our connection back up and running on a speed where we can actually do something on. When we phone the call centre they log a ticket and the dealer must come out. Everytime they are telling us that its the trees thats blocking the line of sight but the times when we do have connection (month or 2 or more) the trees wasnt a problem then. None of the trees moved from place. I dont believe trees can move. When the dealer came to our premises to see if everything is fine. He is only stand in the road close to the small gate. He is very rude. Our internet were fine for the past week( 2020/02/10 till 2020/02/16) but on sunday morning the connection we have got were below 1mb per second. Now all of the sudden the dealer are blaming the guy that were with him when they came and instal the wireless internet for all the problems.(sadly he has passed away) And the dealer also offered us 50% of our installion fees back of we would cansel it before day end. Now jenny internet and the dealer want me to sign a form to say we are happy with our internet connection. How on earth can they think i will do that. When we do have a problem they also want to sent someone out to see if everything is fine from our site but nobosy came and the internet were fix from there site. So there is an example that the problem is not from our site. Now they want me to cansel the service. NO!!!! Wait ...they want to cansel it without our permission because they keep on saying its the trees that move from one place to another.