Unhappy customer (jetstores)

I'm not happy with jetstores I paid my account in full December 2021and my funeral policy notified me that they'll no longer cover my daughter as she is over the age, I then decided that they should just cancel the policy. Later they sent me an email saying I owe them my account is in areas as they had my account opened which was shocking to me because my December statement tells a different story. I sent an email that had supporting documents about the account (jetstores acc, bank statement) showing the transaction 🙄. To my surprise I still got an email saying according to their records I owe them with no attached documents showing where was the error that led them concluded that I still owe them. I actually want nothing to do with jetstores as I feel like I am taken for a ride 😡😡😡😡😡😡. I will definitely make sure that I get my account closed with them as they don't value customers.