Contract cancellation

I had a contract with vodacom of which I cancelled last year 2019 December paid it in full .This year I realized the account is still active I called Vodacom they explained what i had to do previously ,so without dispute i had to pay another R500 even aftr my contract was fully paid and another 262 to cancel the contract .Now when i try to check, the contract is still active .seriously i dont know how to cancel this and iam not going to pay Vodacom again for the service I stopped using a year ago .

They are making it impossible to cancel the contract and it’s messing up with my credit score. Thee worst decision i made was to open a contract with them.