Lack of communication regarding instalation

As a new customer I am very disappointed in the cartrack sales agents who failed to communicate that they having a stock take today. I was scheduled for instalation today on my car. Waited for them for whours to let me know when they will be on the way to me. They failed to communicate and it took me 2 calls to only find this out and was force to reschedule. Do they honestly think we have a whole Saturday having to sit arround and wait for them and they don't communicate. This is bad service from the beginning already. Makes me wonder if I must cancel the entire service. They better not try to charge prorate as now they will