******** Debit on a Closed Account and Aggressive Threats

After selling my car and communicating cancellation of my account (which first and fore most was done without my knowledge through my finance company), Cartrack have continued to debit my account every month.

I have since communicated multiple times that I have emigrated and sold the car and cancelled the account and the continue to ********ly debit my account (which is closed as account to be moving and hence bounces).

The latest is the aggressive threats via WhatsApp that they will blacklist me and take legal action against me. Have tried to resolve multiple times, will seek legal advice and let everyone know.