Frustrating WIFI provider - RSAWEB

I had my first fibre WIFI account with RSAWEB many years ago. Over the years i have had many accountswith them, but I have just tried to cancell all my accounts due to their appalling customer service. It seems their different departments work in silos and one is unable to get any of them to understand simple issues. I was only trying to transfer a VOIP line and WIFI. Two months later I am still being billed for both even though I no longer receive the service. I have just had my one remaining account suspended due to non-payment even though i am in the middle of a dispute and after 2 weeks of being transferred around to different departments and having random tickets opened. Luckily I had already cancelled this final service - well hopefully