While completing a purchase on the Epic Games Store, you might have an option to pay with PayPal or Xsolla depending on your region. Upon placing a PayPal or Xsolla order, you will be redirected to their website to enter your purchase information.
If you have not entered the information correctly, or your payment method has not been accepted, your purchase will be declined. In this case, you should contact PayPal or Xsolla directly for assistance regarding your purchase attempt.