I just bought a pair of boat shoes (Sperry Topsiders) with a deep discount . They are maybe 1/2-1 size too big. However, if I tighten the laces the shoes fit comfortably in the heel, but a bit uncomfortable on top where the bottom of the laces meet the top of my feet. Should I return them or should I use them with with tightened laces? Does insoles help with shoes that are too big?