SUPERSONIC CANT CANCEL SERVICE BUT CANT GIVE ME SERVICE

I am pulling my hair out of frustration with Supersonic. I cancelled my account with them by giving the required momths notice. I even paid all due amounts including the claw back. The cancellation was supposed to take effect yesterday. Today, Supersonic has not cancelled my account Alternatively cannot confirm cancellation. The new ISP is unable to do the migration, I am unable to work and have been without WiFi for two days despite not owing Supersonic anything. Instead the cancellation is costing me money as I spend a cumulative 2 hours trying confirm cancellation and also unable to conduct business. I AM GATVOL WITH SUPERSONIC.