Absolutely shocking service

I have 2 vehicles that have car track in and just before Christmas I contacted Cartrack to cancel the one unit and install a new unit into the new vehicle I've just purchased. We did the contract and everything over the phone and was informed a technician will be at our premises on the 24 December. On the 24 December at 3pm I got the call from the technician to say they're not coming anymore but could they come on Christmas day which I said no too. Then I had to phone Cartrack a few times again to find out when they will be coming only to be informed they will be coming on the 5 January at 8am. We'll it's the 5 January and 12:42 and still no one is here yet. They were quick to call me this morning and tell me to pay the cancelation fee for the previous car but not willing to assist when installation will happen. I have already called Cartrack this morning to complain and yet I still need to chase them to get the new unit installed. Absolutely shocking service this time round and think I'm going to cancel both cars and move my business somewhere else.