About french tickets, the deadline for a refund is/was one month from yesterday. So, no emergency.
Ticketnet now says that people who are ok for a reschedule have to keep their tickets, it is different from the previous SDF policy, which has been removed from the website. It looks like a big mess, so i suggest everybody to wait a few days and see what happens.
For foreign people who will be in Paris next week, i suggest you to ask for informations directly at ticketnet or francebillet box offices in Paris.
ticketnet box office are virgin stores, click on withdrawal points [
www.ticketnet.fr]
francebillet box office are FNAC stores[
www.francebillet.com]
I doubt you will be able to get a refund directly at box offices if you purchases your tixs through internet, but probably they will be able to help you, to give you information, to take your refund request. And if they can't, it will me more secure to send it by mail from France.
Be ready for queuing, you won't be the only one..