Appeal the ban via Riot Support. If you were banned unfairly (false positive), they will review it. If you were cheating, they won't.

: After 120 days, you can try creating a new account to see if the "VAN 152" error is gone. 2. Submit an Official Ban Appeal

When Riot bans you, they store these identifiers in a blacklist database. Creating a new account won't help because Vanguard scans your hardware during login and matches it against that database.