What ever you do don’t take Telkom contract

I had a Contract with telkom with a unlimited date sim which we agreed that it’s fixed. Only to find that I have to pay extra fee month end I couldn’t and they didn’t want me to cancel the contract with them. So they kept on on changing me for 6months for data that I was not using. It ok I made arrangements with them to pay the money, I payed the outstanding balance but still they are on my case saying I owe them