A quick note to manage your expectations, Mods do not have the ability to promote or relegate teams, this has to be done by iGP staff.
They withdrew support to manually move players between tiers some years ago. If the player wants to promote to Elite I suggest they find a league with an active Pro tier and promote to Elite on merit. Then they can move back to the original league.
Here are two leagues that would work, both start their new season tomorrow...
Velocity 1 - 20:00 UK time
Velocity 2 - 21:00 UK time
Community Manager