Instructions:

1. Fill out the form and indicate whether you want to modify or cancel the service. For more details, please refer to the "Terms and Conditions" in articles 3.7 and 3.8.
2. Specify all requested changes. You will receive feedback on feasibility via email, including any applicable surcharge.
3. In case of cancellation, you will receive confirmation via email and the refund will be issued using the same payment method used at the time of booking.