myetherwallet.com admin and his team is very very shameless and giving hackers to chance to hakeing
theifting accounts these involve in this hacking and thifting
why not improve security like e mail or sms code before loging? they are also theift
I think you may entered into the clone website of myetherewallet and that's why you have lost your funds.
As per the agreement of MEW they do no hold your private keys so you are the responsible person for your funds if you lost your private key even they can't recover back it to you.
If you still you are not convinced provide the URL you logged in and lost because close website uses a little change in the words from the official MEW.
It never happened for me,because I always login to the MEW through the bookmark so there is no chance for that to happen.