Rogue business services by Supersonic

In July I've informed Supersonic of my cancellation to my wifi subscription. I've called and send emails but Supersonic ignored my cancellation request and keep on sending me billing statements, I've escalated, Sandra and Joshua promised to intervene and with no luck. Joshua even called me, he asked me to reply private here on hello peter and never came back. I find Joshua as a **** and lack ethics in resolving customers queries. I've referred so many people to Supersonic but their services is terrible. They operate like a rogue business. Their billing department sends me statements despite my cancellation request that I was advised that it will be activated. Supersonic is a rogue business that run an ******* business against customers wishes.

Regards, Fannie