You are on the right track. Unresponsive Manager is the official WikiTree 'go around.' You have already made some of the required contact attempts. Most likely, your relative has blocked e-mails from WikiTree or sends them to her spam file. She probably never sees them, as opposed to actively ignoring them. If you can contact her directly, that would be best. Otherwise, follow the Unresponsive Manager steps, and you will get where you need to go. If she has actually tuned out WikiTree, you won't be annoying her. Good luck!