im sorry to hear about about what you lost mate. i post this issue already that some hackers are using fake airdrops on the email few months ago that if you will finish the signed up there will be a phishing site of MEW site. thats why always becareful  when doing airdrops, one of my friend wallet also get hacked because of airdrops. from me better to choose good airdrops to signed up for. because if not we can be a victim also. all you can do right now mate is move on, and start all over again. make sure that you will use authenticator and metamask for your wallet.