Phone them is the best way Eric.
We use Dobies, T and M, Van Muewen, and Parkers for plants like bare root Phlox to grow on for our sales bench.
We do get dud plants, but in all of those mentioned they have replaced them after a phone call, and that is after 4 or 5 months since receiving them We grow them on in pots during the winter, under cover and look after them. By Spring we can soon see which have failed.
So go for it tell them what you think.
Malcolm