I was approached by ...

I was approached by cartrack to install a tracking device in my vehicle, they were supposed to install on Wednesday 12pm, they didn't call me for cancelation or anything whatsoever, I called them and no knew about the device to be installed, the made me agree telephonically but never pitched for the installation, if here service is this bad now already, what about when I'm in real need or in danger? What should I do?