Need help: Can't access old RGSC account

[DEE]

I deleted my old email which was apparently still linked to my RGSC account, and now I can't even get into GTA V Enhanced because it requires me to login to RGSC.

Support can only help me if I know the date when I linked my RGSC with steam, but I bought the game 10 years ago and there is no way to find out.. Any idea what to do?

[Wizzen One]

Try to log into that old email to reactivate it. MSN, AOL and Yahoo still keep my old email addresses and the mail that was saved in folders and left in inbox, not those that got deleted.
If you did not do the phone link or the question answer account safety bit you can still get old email reactivated provided someone else did not choose it which is typically blocked by the linked phone# and chosen question/answer protection and or a linked email that is still active.

[psykoteky]

You also have your R* games on steam - and their purchase dates, or earliest achievement dates to work with to try to find a date in which you linked your steam to social club.

edit - a date you can try -.- Unlocked Apr 13, 2015 @ 8:29pm.