OakleyLt Assault Lthr mens Military and Tactical Boot

I wear a 11.5 in work boots (thorogood,redwing) and a size 12 in tennis shoes (Nike,under armour, ASICS). What size is Best?

Are these Marine corps authorized?

Im an 8.5-9 in tennis shoes. What size should i order?

I returned the shoes because they weren’t the right size, and I just got charged for them again. Can I get my money back please?