Contact closed for over a year and now I am being asked to pay??

I received an email on the 02/12/2022 stating I owed monies for a contract.

I responded on the 02/12/2022 - Your records should reflect that this account has been closed for a year. I no longer have a contact with you.

I received the following text on the 19/12 /2022 - Dear ALP SANDERS, Please note that due to the festive holidays in December & January your subscription for your Matrix\Beame\MiX Telematics account reference *** will be debited on the 22 December 2022 , and Your next debit order will be on the 1st of Feb 2023. For any queries or to make alternative arrangements please contact ***.

I sent an email stating the following - As per my email below, I sold the car in 2021. I cancelled my contract which was accepted and acknowledged by you. Why am I being asked to pay for a contract?

I received this reference number ***1 and to date have received no updates.