Medihelp threatening to take me to the credit bureau

Medihelp is still being an absolute nightmare even after terminating my contact with them on the 7th of February 2025. They debited money in my account on the 26th of February which is fine and now they took me to debt collectors and are sending letters to take me to the credit bureau because they couldn’t access my account in March. They debited in March after I had cancelled the contract, why do they want to debit in March when I’m not in service of their product?

I called the debtors department and she was being so defensive and she hung up the call on me. This happened because she kept saying my contribution for February (which they took) was for March and I’m like okay, if it’s for March why do you want to debit for March again and she hung up on me