Is there a way to retrieve lost contacts and emails after my yahoo account has been hacked?

First you need to regain control of your account and reset your password and security questions with longer and stronger ones. A password should be at least 12 characters long with mixed symbols. (It only takes a few hours to crack ANY 8-character password.) Yahoo allows you to invent your own security questions so they are easier to remember, but make them ones that will not change - NOT 'My favorite ...' When the password doesn't work and the security questions have been changed, go to https://edit.yahoo.com/forgotroot/ In case of a hacked Yahoo account, where you cannot sign in, (a changed password and/or secret questions), the Account Verification department offers ways to contact them: 1. Call 866-850-4303 toll-free (Open 7 days a week, 6 a.m. - 6 p.m. Pacific Standard Time) The line is usually busy, so be patient. 2. After filling in your ID and password as usual, click the proper category of 'I can't sign in' to send an email with all of the information an agent needs to respond within 12-24 hours. - Give them your identity using your country, and the same alternate email address or mobile phone number and Security Questions and Answers that you provided during registration or the last time you edited. Knowing the approximate date when you set up the account also helps. You might also be asked for your birthday, ZIP or postal code at the time you last updated. Check your alternate e-mail for a response too. If the contents of the account were deleted, or the Address Book, act NOW! There is only 48 hours for recovery of the mail, and there are no guarantees. The Restore Help form depends on the mail you use. Read this Yahoo Help page first for details: http://help.yahoo.com/l/us/yahoo/mail/ymail/basics/basics-01.html;_ylt=AtMw_Wops0XuZB72mW1S5BCFm3tG Classic Mail: http://help.yahoo.com/l/us/yahoo/mail/classic/mail_restore.html Regular Mail: http://help.yahoo.com/l/us/yahoo/mail/yahoomail/mail_restore.html OR: Click Contact Us on the Help page, and sign in. Click the Yahoo! Mail Restore Help Form and fill it out. NOTE: That request will delete all e-mails in the Inbox since the 'Restore' date, so keep moving these to another folder, or forward to another e-mail address. (or read and delete.) (Check the Spam folder if there is no reply in your Inbox from a Yahoo! Technical Support Agent.) (Ribbit)