Vodacom Upgrade Issues

I took an upgrade on 7 October. I was told that the package is R1800, meaning that that would be my new monthly installment. In early December 2023 I enquired about an additional new contract. I was told that I needed to pay R3800 to settle the old contract. It was the first time since the upgrade that the settlement of the old contract was mentioned, I actually thought it was embedded in the new contract installment, somehow. Nonetheless I paid the R3800. To my surprise my new invoice at the end of December indicated that I needed to pay R3300 as opposed to R1800. Upon enquiry with Customer Care, I was referred to Upgrades department who informed me that I am still paying an additional R800 towards the old contract until end of March 2024. I am extremely upset about the misinformation, first, why was not told that if upgraded in October I would still need to settle the old contract, second why was I asked to pay R3800 to settle the old contract, where this R3800 go if the old contract is still not settled?

Someone needs to escalate and rectify this urgently!!!