Allo there,
The 90 day cooldown is part of Bungie's cross save policy and as such can't be reduced or removed.
[url=https://www.bungie.net/7/en/CrossSave]Cross Save FAQ[/url]
[quote]Can I disable Cross Save once I’ve enabled it?
Cross Save is intended to be a one-time action, but we realize there may be cases in which you want to visit the characters you left behind. Once Cross Save has been disabled, you will have access to your original characters on each platform. [b]There is a 90-day wait to re-enable the feature. This policy exists to discourage activity like account recoveries by other players.[/b][/quote]
English
-
If they did it for one person then they would have to do it for the next and the next. Then players would start abusing Bungie's good will even lie (proven fact that people lie on these forums yo try to get what they want or to cover up what they did) to get Bungie's help. As in your case Bungie did have a form that allowed players to swap the linked accounts around if they selected the wrong one as their main. This was abused so Bungie was forced to remove the form and the help. So you have no option but wait out the cooldown period.