If you recovered your hacked account then remember to check account settings ...

[apoorvlathey]

My account was hacked a few months ago, and thanks to Cyrus I got it back in a few days only.
Today I came to a shocking discovery that the hacker had added all the users to my pm's ignore list and also disabled pm email notifications, and so no one was able to reply to my pm's.
That's how I got to know of PM ignore list.
Its located at : Profile >Personal Message Options > IgnoreList

On a final note, you must check all account related settings after recovering back your account.