2nd time Cartrack has promised and failed to deliver

After a month of back and forth, paid for the monthly subscription for a tracker that still sitting in my old vehicle at a dealership, finally Mandisa called to offer a discounted rate and to setup a proper installation and for me to give Cartrack one final chance after the poor non existent service received to date. Install was scheduled again for 8am at the dealership, i arrived early as always, technician then called after 8am to say he didn't have the unit with him and had to still go and pick one up and will only get to me later, so yet again Cartrack and technician's have promised and failed to deliver and wasted my time for the 2nd time now. Breach of contract now, now null and void as per Consumer Protection Act. Why must i have to accept this service and be forced to stay with Cartrack after all of this?