Dilg — somebody accessed my account

Good Day,

Somebody accessed my account and replied important emails. The hacker replied to an email asking my decision and the reply was totaly opposite to what i should have replied/decided.

The hacker also sent email to my friends with a printscreen attachment of one of my personal emails.

This has caused me a lot of troubles and worries for days now
The account is [protected]@yahoo.com.ph.

When i acces my account, it always say its locked.

please reset my account and send me the new password in my alternate email [protected]@yahoo.com

And also, how can i be assured that this will not happen again. What do I need to do?

Hope you can act on this matter in the earliest possible time

Thank you.