Have you proved the merge? If so, have you both approved it? That is the point when you probably need admin to complete the merge.
I am not sure if you can propose or complete a merge with living people but I would 'assume' you can if you are the PM.
Send an email to info@ wikitree.com if you can't propose it or if you can propose it, both have agreed to it, but you can't complete it. Make sure to include the wikitree IDs and the reasoning for it.