You can use this service to reset your Battle.net password, which will remove most account locks.
Migrate your Destiny 2 content on Bungie's site, but make sure you've claimed any Battle.net keys first!
Use this page if you wish to change/modify your Contact & Shipping address for your Battle.net Account.
Troubleshooting steps to help you connect to the Battle.net desktop app.
What to do if you can't open the Battle.net desktop app, and there are no error messages when you try.
Information about retrieving a locked account.
Unable to install Battle.net Application after downloading from the website.
How to unlink a Playstation Network, Xbox Live, or Nintendo Switch account from a Battle.net account.
How to report harassment taking place within Battle.net chat (mobile or desktop)
What to do if you earned Twitch drops in the wrong Battle.net account