Faith Connexion BLACK TAILORED WOOL COAT, buttons need to be fixed!

It's a gift from a friend, but I am not sure whether it is authentic. Sell it since it's not my style. Size s Faith Connexion takes on the version of the classic tailored wool coat featuring a double-breasted button fastening, off-white, wool blend, notched lapels, two front flap pockets, long sleeves, straight hem and long-length.