BLACKLISTED

I cancelled my contact with Cartrack, I am still getting messages that if I pay the outstanding amount, they will reactivate their services and they want to blacklist me. I am using a different service provider from 1st October 2024. I am not willing to pay the outstanding amount, as I told them over and over again that I want to cancel the contract. I did speak to one of their agents to cancel the cartrack and said he will forward cancelation documents, and I did not receive any documentation from Cartrack.