Vodacom is ****ming us

I had data contract with vodacom which was supposed to expire on April 2024, I tried to do an upgrade they refused to give me an upgrade, I then removed the simcard and move to cellc, I see that they do debit my account even though the account has expired, I reverse the money, later I found out my credit score was affected by unpaid vodacom bills, I call vodacom and explained that I'm not using their services why are they doing this to me, they saying I must pay them about R1000 now and file for cancelation, if i don't they will mess up my credit score and shut down my simcard, I told them I don't use their simcard, they said they don't care, I must pay