Charging me for units that they do not support, without advising me that my cars cannot be located

I've cancelled 2 contracts with them today after 15 years. I requested a unit test and they advised (morning after the request) that they cannot trace my unit as it is out of warranty and no longer supported. Then why are the charging me, raising my premiums and not advising customers whose units they no longer support? They know what devices they have installed in the field? They should be pro-actively pinging their units. I've given 30 days notice and been told that they will still charge me again on the 1st of Feb for a unit they do not support. And I must pay a separate charge to remove their unit from my vehicle. How ********* and irresponsible!