Bad service

I have a contract with Telkom which expired on the 22 May 21 on the 26 April 21 I called Telkom on 180 spoke to one of their agent to cancel my iPhone contract and I was told I will receive a message confirming my reference for cancellation which I never did.

On the 22 May 21 I went to Telkom mobile to confirm if the cancellation was done to my surprise it wasnt then telkom phoned me and they told me that they won't be able to cancel the contract cause the number is suspended.

What makes me angry is that there was money in my account until the 10th but they never debited my account now they are making this my problem and they were supposed to debit on the last day of the month.

Which this similar problem also of not debiting also happened in February I feel like this is part of their delay tactics so that they don't cancel the contract on time that is why they dont debit on time.

Please help me with this problem so this contract can be cancelled as I am not working and I can't keep on paying for the contract that is finished already..