Impossible to close an account, and the debit order continue to return even if I reverse it

Impossible to close my account, while they charge me for a car I do not have every month. I do not live in South Africa anymore, I have not had a car in SA for 2.5 years and have been trying to cancel my Netstar service for 2 years. Mails are not answered back from Pam Govender from Customer Service, or Ashendra Singh from the Credit Control again sent me an invoice - this after mail on mail that I am trying to close my account. I have copied every email in Netstar I can get hold of, NO HELP! Hanlie Spangenberg, email: ***, +***72