Thank you for contacting us !
Regarding to your previous e-mail, We would like to inform you that you are required to provide us with a clear change request with an exact date in DD/MM/YYYY format in order to to contact the airline company on your behalf and check for you the availability and cost of it and the feasibility of the change.
Please take it into account that we can only manage your request latest until 24 hours before departure time.
If you have any further questions, please do not hesitate to contact us !