It seems a bit odd that it took that long to decide they do not fit.
I would also suggest getting them looked at or stretched. You could bring them to Nordstrom and ask them what they suggest....outside of getting your money back.
As for Ferragamo, that would be a waste of your time. I bought a messenger bag from Neiman last July and the strap snapped off while I was traveling....NM refused to do anything and Ferragamo said it was outside of their...