Cellc

I had a 24 months contract with cellc for a data sim which I took since 2017 and I kept upgrading after every two years,normally I always upgrade three months before the 24th month of the contract. The last I took was expiring the end of March 2023 , and since from February I've been calling cellc trying to make sure that they understand that I'm no longer upgrading and I want the contract to end.The contract ended on March 2023. It was a simdata and I was paying 250 rand for 30gig day and 20 gig night. To my surprise on April cellc debited R547 on my account that I don't even know what it was for.I disputed the debit order and this month May cellc debited R1427.98 from my account.The simdata is no longer active since the 1st of April I never used that sim as it was for data and the contract ended.When I ask they say the sim is now on month to month contract. I never wanted a month to month our deal was a 24 months contract.Besides what kind of a month to month expensive data it is if I have to pay R1427 just for a Meer 30 gig of data