If you want to contact Aegean to cancel your flight ticket, then you have two methods for talking with a live person at Aegean and requesting the cancellation of your flight ticket.

Phone Call
You need to adhere to the following steps for the cancellation of a flight ticket on call:
• Dial the Aegean Airlines Cancellation Phone number +1 (833) 732-8158 or +1 (802)-341-3447,
• Wait on the hold time to till the call meets with the concerned person,
• Provide your PNR number and name for the cancellation,
• Select a mode to pay the cancellation fees applicable at the time of cancellation,
• The connected person will cancel your booking at Aegean Airlines within a few minutes and send you the confirmation email.
Get more info:- https://www.travelflys.com/blog/aegean-airlines-cancellation-refund-policy