Wrong units fitted & no response from management

<p>We have 5 units with cartrack on a business subscription. They fitted 2 of the vehicles with the wrong units and one of the other units don't function properly. We have left 9 messages and have spoken to numerous people - but to no avail. We are about to cancel our subscription & our debit order as Cartrack is now in breach of contract. We cannot trust cartrack to recover our vehicles if this is the level of service that we can expect. </p>