Account Progress Lost on Apex Legends(Xbox one)

Still had no reply to the ticket ive opened with support days ago. Also came across this( https://forums.ea.com/discussions/apex-legends-technical-issues-en/do-not-unlink-your-ea-account/5653655) on the forums and im 99% sure its whats happened to my progress when i had to change my xbox accounts default email :( Please help i only came back to play matches with my Nephew, now i dont even want to open the game and look at everything ive lost, its depressing

Hey SpliiffBeanzz,

Sorry to hear you've been having some trouble getting your progress to show back up here.

This would be happening because your Xbox account was previously linked to a different EA account. Progress is stored on the EA account level, not on individual platforms like PlayStation, Xbox, Steam, etc. Because of that, if you link your platform to a different EA account, you'll lose access to that progress.  

There is not a way to transfer or merge content across separate EA accounts I'm afraid, so the only way to try recovering any missing content would be to re-link the Xbox account to the previous EA account. If that earlier EA account is using an email you're unable to access, you'd then want to change the email address there rather than linking it to a different EA account.

Thanks for the reply EA_Mako 
Im sorry but i dont fully understand what im supposed to do to fix it, i played on xbox for years before cross progressions was implemented under what we will refer to as [edit: email address removed] and stopped playing. About 2-3 months ago i had to switch ISP at my residence causing me to login to my xbox microsoft account at [edit: email address removed] and i swapped the account email over to a brand new email [edit: email address removed], I have no access at all to the old domain email [edit: email address removed] and cannot recreate it but im still on my original xbox account so im quite confused. Are you saying when i first played apex before cross progression it automatically registered me an EA account at the [edit: email address removed] email aswell and thats what i need to try get back into? Sorry for the long post, your help is greatly appreciated.

SpliiffBeanzz 
If you played on Xbox for years, that would have been while your Xbox account was linked to a different EA account.

The EA account you're posting from has only launched Apex on Xbox for the first time very recently, meaning your progress is on an older EA account.

You'll need to locate and re-link your Xbox account to whichever EA account that was in order to try restoring any progress. 

If that older EA account is one with an email address you can no longer access, you'll need to contact support to have them help update that information.