Expired contract but I must still pay the amount.

Description of the policy is SECDRI *** Amount is R171.70 I have a problem with Secdri debit order that was debiting from my account since 2020 August, and upon agreeing to the contract it was supposed to be only three year contract ending 2023 June/July. I was never informed about renewal of the contract, and they decided to continue to debit my account without my concern however decided not to leave money for the debit order to go through. And on the 14th I was called by one of the urgent to ask when are they going to get their money? and I said to the lady that according to my knowledge the contract expired already in 2023, which I asked her a question that why they've never contacted me about the continuation of the contract. Now to my surprise I am sitting with a situation whereby I've been told that I am owing R1800.00 & how come I don't because I even asked them about the statement which I never received, however I asked them where is the proof of my contract which I took 2020 until 2023?I didn't get feedback until now ,so can you please help me with the matter because I don't even know where to cancel the contract with this people because even if you call their call center they will take you from pillar to post without getting any help while you hold for too long to get help telephonically. And yet again they came back again into my account 1 Dec 2023 they debited R171.70 and I am happy with their service because I don't want to continue with them.