Less considering, more doing! Ask the hotel to give you a packet of laundry detergent or head to a convenience store for some. Sink and hair dryer for the underwear and socks. How about shoes? Don't forget you'll need smart shoes!

Those places that sell suits don't sell nice shirts and dress pants seperate from suits? Also, you are in Europe, nothing wrong with a good suit! Be sure to keep all the receipts and keep pressing the airlines until they repay you in full regardless of their policies. Ideally get your company to repay you and let them fight it out with the airline. No reason you should be the one out of pocket.