Duped into upgrade, false pricing and options

I was called by so called Vodacom to renew my contracts. I repeatedly asked if it is Vodacom before agreeing to upgrade two of my contracts on condition of the pricing they were offering as well as me getting the full terms and conditions. Neither arrived and I immediately called to cancel and reverse there so called offer, only to realize I was duped by there so called sister company buymondo. It’s been almost a month and I keep being moved from pillar to post getting different excuses. I get zero assistance in getting back to the contract situation I was in before I was duped. I called within the 14 day cancellation and they still won’t reverse anything. I have been charged and continue to be charged. I have reached wits end and ready to go to any end to get back to where I was before there duping of customers. PLEASE ASSIST