that one is a guinea. the biger bird with grey feathers in the middle is a guinea. some one got you unless they were selling guineas and calling them blue isbar!
Contact the seller, maybe it was an "honest" mistake, but I thought guinea eggs look more like a triangle than a round chicken egg and Isbar eggs are green right? so a breeder should have known the diff, maybe the seller sent the wrong boxed up eggs to the wrong buyer. They are cute though