Whether they're disinterested, ignorant, annoyed with their boss or just busy despite appearing otherwise, it's your money so you make all the decisions. You should have taken control of the situation by approaching them, allow them the benefit of the doubt, and then, if they do prove to be gormless or unhelpful, go elsewhere, but do so having made a decision based on at least a little research.
Or just steal the shoes, they probably wouldn't notice...
^ this, if you need a hand, ask.
Whether they're disinterested, ignorant, annoyed with their boss or just busy despite appearing otherwise, it's your money so you make all the decisions. You should have taken control of the situation by approaching them, allow them the benefit of the doubt, and then, if they do prove to be gormless or unhelpful, go elsewhere, but do so having made a decision based on at least a little research.
Or just steal the shoes, they probably wouldn't notice...