The offer is called Cat’s Contraptions and shows Cheshire Cat from the Riddles in Wonderland event. The offer is random and is in no way connected to the event just like today’s Stardust offer is in no way connected to Knights of Avalon despite the offer being presented by Merlin.
Much thanks to @Pois1 for his impressive database of screenshots for every offer in the game.
Prices shown here are in the Czech Koruna (since Pois is from Czech Republic):
@marlenus, your alliance mate could’ve purchased the offer a while ago, and SG is just now resolving the issue. Did your alliance mate accidentally purchase that offer and later seek a refund? He can check his purchase history through Google Play Store, Apple’s App Store, or other store he uses to download apps or check his statement from the bank account or credit card used to make the alleged purchase around the time it was supposedly made.
It should also be noted that not everybody receives the same offers at the same time unless that has since changed.