Supersonic LTE shocking service!!!

I cancelled my service with Supersonic in April 2020 yet they continue billing me and debiting my account. I have escalated this multiple times and Supersonic themselves confirm every time that I no longer have a subscription with them. I received a refund only to be debited again every month thereafter. I have 3 case numbers and have been assured that the issue will be resolved. Supersonic said someone will call me back to confirm cancellation and refund but this never happens! Don’t sign up with Supersonic! ******* that take your money for no reason at all!