Vodacom - Did not Request an upgrade - Huge deduction from bank account

I am extremely unhappy with Vodacom. I have reported my problem 3 times and they fail to resolve it. Vodacom deducted R2020 for my bank account this month and they state that a new 066 number has been added with an upgrade. I have never requested for any upgrade and have told them this 3 times. I have 2 reference numbers and expect Vodacom to resolve my query and refund my money immediately. REF NO: 20 DEC - 1- *** and 2 Jan - ***. Its very upsetting that I have to resort to having to place a complaint on HelloPeter and shame Vodacom...