I requested a cancelation of service for a private car, and Cartrack advised me that a cancelation fee will apply, but it will be debited from my account with my normal premium

I requested a cancelation of service for a private car, and Cartrack advised me that a cancelation fee will apply, but it will be debited from my account with my normal premium. A few days later, I received collection calls from Cartrack stating my account was in arrears with this amount. Today, after I requested their banking details for me to pay this amount, they sent me a nasty email informing me that my account has been suspended, but this is for an amount that is not even related to my business unit nor is it for outstanding premiums