Poor service that you cannot even cancel! A ****!

I have literally been trying to cancel my fibre with Supersonic since September 2021 - I am supposed to have been contacted by an agent within 5 days from emailing them - literally a year and I have not received anything. Oh, and when i check my account on their online portal it says that I am on a 40mbps fibre line, but I'm only ever getting 20mbps. I want this fibre line cancelled, as I do not want to use supersonic any longer. This is **********. My next step is going to ISPA and lodging a mediation request. i want my fibre line released so I can actually sign up with an ISP that provides a proper service to its customers.