First secure the booking confirmation, invoice, contract terms and standard information form. Then record every payment with date, amount and payment method. Mark which services were part of the package and which you booked separately.
Save the cancellation or withdrawal notice unchanged. Record who made it, when it was received and which reason was stated. Then classify the case under section 10(1), (2) or (3) PRG. If the classification is uncertain, list the facts that still need confirmation.
Calculate the expected refund and compare it with the operator’s statement. Check the 14-day period from the documented receipt. If payment is missing or reduced, combine the declaration, deadline calculation, payment records and correspondence in a short chronology. That creates a reliable basis for further assessment.