Vodacom taking money without autharisation.

Vodacom upgrade 2 of my contracts in August/September 2020 without my knowledge. Now i asked them to refund me on that adjustments on my contracts. Don't think they will even phone or answer you!!!!!!!! I phoned the Call centre 5 times, every time they log a call and will fix. but they don't. Then a lady helped me to make adustments on my curent contracts to stop vodacom of adding extra costings on my contract. They gave me Vodacom Vouchers that i could spend at pick a pay. After shopping i want to pay, o dear only some of the vouchers is going thru as payment. Now i am calling vodacom to sort out the other vouchers, after 9 people transferring me, no one is working with that. another go te hell from vodacom.