VOX poor service and no feedback

The fibre line did not work, it was more off than on. I reported the fibre line on numerous occasions and every time they confirmed that they will investigate and solve the matter. No feedback. I then cancelled my services with them on the app. I phoned in to confirm and said that I will pay the remaining months of the Wi-Fi extenders cash and I will pay the month of May 2023, but I will not pay for June 2023 as the line is off most of the time. They referred the matter to a management, still waiting for a call, email or assistance from them I have since phoned in on numerous occasions to speak to a manager or someone that can assist in solving the matter. I then decided that I will return the debit order and make a stop payment for VOX as this will attract their attention I am still waiting for feedback from them. The service is utterly poor! I would like to finalize the matter and put this bad experience behind me.