Supersonic is the pits of hell

If it was possible to give negative stars I would. I canceled my contract with supersonic, and gave them a month's notice as requested. They then cut off my services a full 5 days early. If that wasn't bad enough I was told that they would not release my line to my new ISP unless I pay the claw back of 1982.05, which I promptly did because I need Fibre as I am working from home. Imagine my shock on the 25th of August they debited my account with the 1982.05 clawbacn that I already paid! ?. What followed by being on hold for 2 hours and having my calls dropped when I'm caller number 1 on multiple occasions. When I eventually got hold of someone she said they would call me back and guess what? Still no call. This has been the worst treatment I have ever received from a service provider. I tried contacting their accounts department and even sent them the proof of payment but they are just ignoring me.