Poor Customer Service

I had my mum car booked in for a smash and Grab installation on Monday the 11/05/2015, at 09:00 am. PG Glass Lenasia sent me an SMS at 08:51am stating that the guy who does the fitment is waiting for me. Upon my arrival at 09:05 i was informed that the person left the workshop on some \ other"work and would only return at 01:30 pm that day and I would have to return at this time to have the car done. I find this unacceptable! The manager phoned the person responsible but it seem as if the manager has no control over this person and he controls PG Glass and their customers time. I refuse to support a company who does not value it customers time and yes it may have been a small service to be provided compared to the glass fitment services the center would usually provide but as a customer"