Supersonic terrible service keeps haunting me

The only way I sometimes get this company to communicate is if I comment here. I used their services 5 years ago in 2019. I posted many bad reviews because their service was just so atrocious. I made the best decision ever to cancel their service. Now 5 years later I’m getting calls from a debt collector that I owe them money. I didn’t receive a single invoice, email or call from supersonic during this time. Then I try and contact supersonic and I hold on for their accounts department for 40mins and no one answers. Eventually I kill the call. I get that horror anxiety again from having to deal with this terrible company again. Why are they haunting me!? I just want it to be over! They have still sent me nothing. I changed to cell c’s service and what a pleasure to deal with them! 24/7 service, immediate answer when called, great communication. If I do owe supersonic something, I will pay them so quickly to get away from them, but I’m getting that feeling again that this will be a long battle, if I don’t actually owe them something.