CANCELLATION DIFFICULTIES

In September 2022 I sold my car and informed tracker of the sale and cancellation. I received a call from an agent and she confirmed the contract would cancel as per terns. 1 year later, I continue to receive email threats of outstanding payments. Tracker, as a loyal client of almost 10 years, Im very frustrated and dissapointed at your. Cancellation department. None of my emails sent to customer service are bring answered. What now?