Unknown numbers on my Vodacom Statement

We are as long as I remember with Vodacom. In 2024 we discover a unknown cell number on our contract. At our local Vodacom, they said I can only cancel it when the two years expire. In the first place, I don't know how, when or where did we apply for this contract. Now, early in 2025, we discover two new cell numbers, apart from the one unknown that already exists. Now we must cancel this ones as well, only after the two years contract expire. We have our own numbers still, all the time and did not buy anything online or anywhere else. So where did these three new contracts come from, how did it end on my contact? To cancel this is also a problem on its own. I call cancellation, and the they try to sell again a new contract to me, apart from other communication problems with different employees. I confirm with the Vodacom employee if this was cancellation, because I want to cancel and not take out any new contracts. Feels like major *******ion!