Account **********ly upgraded without my verbal or written concent. Two queries marked by Vodacom as resolved but I am still victim to *****! What shocking service from Vodacom!

In July I received an invoice for an account that I was no longer getting any data for front vodacom. I decided to contact Vodacom to query this and to my shock, I was informed that my account had been **********ly upgraded without my written or verbal concent. I went through the reporting process and I then cancelled the account formally and asked for the number to be cancelled or deactivated. I received confirmation that the ********** contract had been cancelled but Vodacom. In August, I received a bill of R9000 for the same account! I reported this on hello Peter and again received confirmation that the matter was resolved. This month I have received a bill of R4000! This matter is clearly not resolved. How can there be so much incopitence in a company that is supposed to be global! My account is being used **********ly and I am being harassed by vodacom to pay for something I am not using! Surely this is ********. Can someone at vodacom resolve this for once and for all!!!