Pathetic service from cartrack

Sold my vehicle in November .notified cartrack to deinstall unit and forwarded contact person no.30 th November desinstallation fee deducted as well as new month premium. Driving new vehicle for the passed 2 weeks abs device still nor installed ...only to find out the 12th December when I called this morning that the unit was never removed from the old vehicle as yet and I'm waiting for re installation.the company is asking for address to deinstall from vehicle . This is pathetic service and this supposed to be for security