FlyerTalk Evangelist
Join Date: Aug 2011
Location: Barcelona, London, on a plane
Programs: BA Silver, TK E+, AA PP, Hyatt Globalist, Marriott LT Plat, Hilton Diamond
Posts: 13,047
And next time just book flexible, refundable rates and you won't have to worry about the oxymoronic "modifying a non-refundable booking"... Unlike airlines - where truly flexible tickets are quite expensive - hotels can quite legitimately say in most situations that you could easily have booked a flexible rate for little additional cost.
The hotel will be your first port of call to see whether they are being flexible about letting you off the hook. If not... whatever travel insurance you have via your credit card or separately. IHG corporate won't do much.