Shocking Service !!!!!!!!

I have canceled this Account 5 months ago on 3 different platforms. To date no one has even tried to talk to me or to acknowledge my request. 2 weeks ago they made contact to follow up on payment that's been in arears for the mounts that i cancelled. on top of this, the line is still active and the new owner cant use for his connection as it still shows' active at Vumatel in my name. This is shocking service after they changes my account from Nepic to them without even notifiying me. Just no response what so ever on telephone, e-mail or WhatsApp.