The warranty only applies if its been given a 12 month health every year check, if not Clifford won't want to know...
Problems with mine... only 1 door would lock! alarm would go off for no apparent reason, it wouldn't accept commands from the fob, immobiliser light used to flash when driving! ect
Any decent auto electrician should be able to remove it for you, that was my only option original installer refused to come and look even when offered £££...