Contract Cancelation experience

I phoned Vodacom call centre on 10 Jan 2024 to ask if they can assist me to convert my current contract to a home data deal. They could not do it. The lady said they cant do it, ohk fine. Then is asked how much it would be to cancel it, since the sim has value for me at this point. Over the phone i was told +/-R600. Today 16 Jan 2024 i called again to follow up on my cancelation quote, which i have requested a week ago. They sent it to me, R4300!!! I was told the manager/team leader would call me to explain this to me, i am still waiting. Unprofessional, unwilling to help!!