It can be frustrating but remember stuff happens........ I work in a service industry and can understand at times how things seem like they get missed. For example I performed a PM on someone's furnace 2 days ago and two days later it stopped working. The guy calls me up cussing and swearing that he paid me $75 dollars and his blanking furnace doesn't work. I go back over there and it ends up being a thermostat problem from an incorrect installation of a $10,000 dollar instal that was less than 2 years old and doesn't have anything to do with my PM. I also didn't bother to pull the thermostat off the wall and check it since I assumed it was installed correctly. I had to charge the guy time/labor to replace the thermostat however had the guy been cool about it to begin with I would have not charged him for the labor..
That was the long way to say it isn't really the dealers fault the blind fell off the wall. I highly doubt I would check every screw on every blind to make sure they were installed at the factory if I was them. Be nice about it and I betcha they will gladly make it right. If they are any type of reputable dealer you may even be well on your way to building a good working relationship for other issues that may came up. I do have to say that I am lucky and the dealer that I deal with bends over backwards to make things right for and help out customers.
