I'll certainly be hoping for a refund - my son has a ticket and at £23.50 for a fecking 10 year old that now won't be going (unless it falls in eastee holidays) I definitely want that back!
I believe Chelsea tickets are refundable as the date of the rescheduled game is/was unknown.
The Leicester game however specifically states on the ticket site that it's non-refundable, as it was always going to be either the 26th or 27th of Feb.