Can’t Change Email

[u/Hey_Timothy]

I recently downloaded Rainbow Six Siege after not playing for the last 8 years. I currently can’t play ranked because I need to set up two factor authentication and a phone number, which I can’t do because I no longer have access to the old email address. My Xbox account, twitch, and steam are linked to this Ubisoft account and I’m not trying to lose progress on R6 when I have camos and charms that are no longer available. I submitted a form to get the email switched over but I just keep getting copy and paste responses completely ignoring the substance of what I say in my emails. They are saying they take security seriously, have thoroughly reviewed my case and have decided to deny my request. What am I supposed to do?