Supersonic shocking service

Anyone had any luck with the terrible service provider Supersonic Fibre we have cancelled our subscription due to the horrific service ( if you can call it that ) after the buy out from nepic , now they won’t release our line so we can move over to our new provider - every time you call you speak to *********** people and can never speak to a manager we have been without internet for almost 10 days now and still no luck , every time we call we get a different answer !!!!!