I'm no expert on these but there seem to be a few YouTube videos of albino African Dwarf Frogs kicking around? Maybe they aren't true albinos or something?

Do yours have webbed front feet or not? If not, they're the clawed version and being optimistic I'd expect it's more of a case of not knowing any better then them deliberately lying to you. Have you tried calling to pet store and asking to exchange the frogs for a refund?

This wouldn't be the first case of a mislabeled frog at a pet store, but give them a chance to do the right thing before getting too upset.