One month notice and still active

I have given notice beginning of November that I'm. Moving and that I need to cancel my line... I have logged tickets online... I have send emails... U have even emailed management... Yet no one comes back to me They have actually closed to of my rickets as completed and that someone phoned me Yes one phone call and I couldn't take it but never phoned me back Then a call for moving my line and I said no I have to cancel my line... She siad accounts will phone. Me and nothing.... I'm already in my new house and still have a active line.. After I did give notice... To make it worse accelerit tries to take a debit order every night.... Costing me bank fees on debit orders bouncing I hope this will make them reach out to me to get this resolved This is not service