Active Fibre sad signal continues

I have been a customer for active fibre for almost 7 month now , I have never missed payment for the service provided through their fibre . For the pass two month their internet connection is very bad , signal is lost from time to time . We run businesses from our houses as we are self employed, in the middle of a quotation the signal just shuts down . I have made more than 6 calls to their offices every time I’m been told restart the router and I still experience the same issue . It’s frustrating for the amount of money paid to get such services , I have proof where I have rejected serval quotes from other fibre services providers to stay with them , but now I’m regretting my decision. I’m sure if they still care about our Internet connection. Extremely frustrating