lol, you're overestimated the powers of the "legacy" team.
Tech support will just laugh at you and say sorry, nothing we can do.
I once got banned 7 years ago or so for this:
(11)The minimum age to play on Battle.net is 13. Your account has been temporarily suspended. Please either email us at email@example.com or call us at 949-955-1382 for further information. You will need to fax in a form signed by your parent or guardian giving permission to play on Battle.net.
"The sooner you fall behind, the more time you'll have to catch up."