Its the same story with all booking for center parcs in France/Belgium/Holland (which are all owned by a French company). My understanding is that French government passed legislation allowing vouchers only so as to protect the industry. (which you can see the logic of as they would go out of business if they had to refund everyone). I had Easter holiday booked for center parcs in Holland, now have a voucher that I can use anytime until september 2021 and if not used by then, it can be cashed in. Personally, I'm ok with that arrangement but might not work in your sitaution.