ACCOUNTS SEND OUT WRONG INFO ON ACCOUNTS THAT IS NO MORE ACTIVE AND PAID UP.

I have complaint a few weeks ago, Vodacom phoned back. Accounts are clear no outstanding balance due, but I stil receive my weekly phonecall, email to say that I owe them. I am so FED UP with this Vodacom Accounts department, you should think a company as big as Vodacom will have more capable people working in theyr Accounts department. Please Vodacom sort out your systems or workers doing the work. Dont know where the glitch is. Really dont want to be rude and I never complain but this just is getting to much. Thank you