OK, the real core Hive wallet address is https://wallet.hive.blog

Feel free to verify this however you like before clicking. Real help looks just like another scam attempt, after all.

You need to sign in there with your user name and password. Then, you can go to the "change password" tab and update everything. But be sure to save those new passwords, because they must be entered correctly, or you will lock yourself out of your own account, too. Copy/paste them into a notepad document on your computer, and write them down on paper.