Unfortunately, Apple doesn’t allow Epic Games to directly refund players for App Store purchases and instead requires players to ask Apple for a refund. Please follow these instructions if you wish to ask Apple for a refund: https://support.apple.com/en-us/HT204084
We are issuing a full refund to all customers who have made purchases on iOS through Epic direct payment before August 28. It may take until September 7 before you see the refund to your payment method. There’s no action needed on your part and you will retain V-Bucks and items purchased.