Does not want to cancel my service

I have now been cancellng my data contract since November 2021 with Supersonic. I have sent multiple emails to request that the month to month contract be cancelled, yet every month I get a new bill. I have tried calling numerous times to speak to someone, but even that with very little avail. I am now sick of this nonsense that they are now threatening to hand me over and I have the proof where I have asked for this service to be cancelled. And I cannot get this cancelled