Vodacom is the Pits

I had my handset upgraded on the 19/07/2019, at the time I was on a top up contract and it is a sponsored contract by my company I work for, I never wished for my package to be upgraded, a lady by the name of thabeleng Ngakane at the Vodashop in Nicolway assisted me with the upgrade, and a few months after, I noticed that she upgraded my package too, when I called her she avoided my calls, I proceeded to call Vodacom Customer care to downgrade my package and they advised that the 3 month period is not up yet for the migration to take place, when I saw my recent invoice I then realized that my line is no longer sponsored, and my employer has not given any go ahead for the sponsorship to be removed, so Vodacom is still receiving the sponsor money for my line from my employer and they are debiting the full amount from my account, and also they told me that there is another airtime line on my profile that is also being debited that I have no knowledge of, I asked that they cancel the line, and they said it has been cancelled, and yet none of these authorization came from me.

Vodacom are sharks, I will not pay the thousands of rands they claim I owe them, as I never authorized any upgrade of packages.

Please help me in this ******ion.

Kind Regards, Suraya