MTN lapsed contract

I had a contract with MTN for the past 24 months ending on November 2021. I went to MTN in January 2022 to say that I no longer need any other contract and was told I must phone a certain number to cancell. I tried but the number is not functional ***. I went again to MTN to cancell and was given the same number and was told it will cancell after March. In June I got a call to say my contract is active and I must pay. I went agai to MTN to say I'm not using their since and I was told to call again. I tried to call the number is not functional again. Please help me Peter... My MTN contract number was ***. It was never used. Regards Daphne