Vodacom ****med me

My Vodacom contract was supposed to end on May 2022 this year so a consultant called asking me if I wanted to upgrade my contract. Apparently the consultant did not upgrade my contract but opened a new contract for without consulting me. Last month I found that she opened a new contract for because another consultant called asking to upgrade for me. Since I got the "upgrade" I haven't used the number they "upgraded " me from. So I've been paying two separate contracts without my knowledge and Vodacom doesn't wanna refund. I want the recordings to prove that I've been done wrong. When I called on the 2nd September the consultant told me that from the system it shows that the consultant tried doing the upgrade but was unsuccessful but the consultant didn't get back to me instead opened a new contract without telling. Hence that is *****!