Yes, I would complain.
I have buyers call or write to let me know if something happens to what I sell to them and most often I appreciate it. However, I also let anyone walk around my farm and come into the brooder room.
Though I am going to change that. Too many undisciplined kids have "accidentally" killed chicks this spring so I am banning the brooder room.
But I enjoy showing off my birds and show most folks around. If kids keep running my chickens and ducks though i will stop that, too. Parents have no clue as to how to make kids behave and I am getting tired of them running wild here. I expect kids to behave when visiting some place. Mine was taught to, as was I as a child.
I know you have learned some important lessons here.
One, NPIP is no guarantee of clean birds.
Two, quarantine is the best policy when bringing home new chicks or chickens.
Three, always look over each individual bird before purchase.
A few months ago I bought some very nice birds from a well known and respected breeder. I quarantined the birds but in 3 months I have already lost 2. NPIP, quarentine and looking them over still did not protect me. I just know not to purchase from that breeder again. Almost $100 worth of learning there. At least none of mine have gotten sick so far.