linked xbox / ea account with no access to email

hello all pease please if someone can help i'd be forever greatful.

I've been on to chat several time and it like pulling teeth.

I set up and linked my xbox account 15+ years ago around the time of OG xbox and original EA ACCESS (now play).

i cant acces this linked account email anymore as its now gone as it wasn't in use (I moved from an eircom.net account to gmail years ago so eircom deleted all account which have not been in use).

this was never a problem as games just worked when playing up untill octoberish. in game it will only reconise my eircom account and mobile authenticator which i also dont have access to.

i have given chat my details when the account was set up / current details. details of two other accounts i dont use (example an account that was just used for tiger woods years ago on wii). ive confirmed my EAID, gamertag and email address it locked to. when trying to confirm details they can't / wont confirm which is wrong.

example the credit card i set it up with is not the current one as that has changes in the 15 / 20 years also and if thats wrong (not the current one) ill have no way of unlocking the account.

i have even offer ed to email in bills with my address on it for old address (my mums) and my current address and id.

one chat person was rreally really good but unfortunatly couldn't sort it. he refrence a possible different email address i used but this is not the one i'm trying to reset.

ive even tried logging into the ea account with the address and guess 40 or so different combinations of passwrods that i have used all to no avail.

So so frustrating.