I bought a small quantity of oak plank flooring to match existing floor. I brought with me a (stained) sample of old floor. Salesperson told me which wood to buy. I bought that, installed it, resanded entire floor and then stained. The new floor didn't match the old floor. It turns out I needed red oak and was given white oak. I brought back samples of newly stained pieces of both old and new floor. I was hoping to receive new floor and was resigned to doing the job all over again. When I explained to (manager?/owner?) what had happened, she immediately arranged for an installer to come to my home in downtown Toronto and rip out the new floor and reinstall the proper kind of wood. Work was completed within several days.
Needless to say, the 2nd installation was done better than the first and I didn't mind that I had to resand and stain.
I actually felt bad that I had bought only a small amount of material from this company but I will surely remember this kind of customer care when I am renovating my next house!