Too late.. got phished...
1.12 ETH.
I am also receiving the same message everyday from a slackbot reminding about MyEtherWallet but since I knew it is a phishing attempt then I just don't mind it. Just remember to never enter the key to that phishing site and as for your case since it already got your ETH then it would be a lesson. When someone ask you about private key, never ever give it because as what others said if you have the keys then its your coins but if you give it then it is theirs.