Problem with my details

If your passport is the only valid photo ID that you have… yes, you need to provide a scanned copy of it… see this support article for details on what’s needed:

Don’t forget to delete the scan from your hard disk after you’ve submitted it.

You cannot text nor phone nor e-mail Customer Support – it’s all done through tickets.

Try this link here:
https://eu.battle.net/support/en/help/product/services/316/638/solution

If that doesn’t work… try the “catch all” link: https://eu.battle.net/support/en/help/contact/322/ticket
You will need to put a lot of details and you can attach upto 4 files… you will need to provide enough info to convince the Game Master that you are the legal owner of the account… see this post here:
https://us.forums.blizzard.com/en/blizzard/t/need-help-phone-number-no-longer-exists/36986/3

Good luck !