Fuck Rockstar. I changed my email accounts a few years ago but forgot to change Rockstar first. This wasn't a problem. Now, after buying GTA V on Xbox and Steam and sinking a lot of time into it over two accounts, they added some mandatory launcher on Steam that forces you to login to their Social Club. Mandatory launcher calls an account that I can't unlink, triggers mandatory 2FA to an email that doesn't exist. They refuse to help despite my willingly handing over a lot of private information - their support system is as good as fake. The end result is I have sank >£100 in buying their games and they ensure that not only do I not get to continue my account on GTA V, but I have been permanently locked out and actually impossible to play any Rockstar Social - walled game on Steam.
Partial 'correspondence' of my third attempt to get help from them. Twice they ignored the support subject.
Judging by other complaints online this exact issue has persisted and screwed over players since the creation of GTA V, so at least 12 years.
I have the same issue with Activision, and here's the kicker. They're exactly the same blueprint. Same support. Same result. Same fake-ass Western names on their signature.
I feel like Rockstar needs to be continuously pressured, injustices talked about, just in case they give.
Just don't give corps like Rockstar money.
Additional:
(from Schwaggaccino • 2y ago • Reddit)
I emailed Rockstar and started a request ticket and they want me to log in to get me to reset my 2FA which is preventing me from logging in.
THIS IS PEAK CLOWN WORLD I CAN'T BELIEVE SOMEONE ACTUALLY GOT PAID TO IMPLEMENT THIS JOKE OF A SYSTEM
Edit: For the time being it seems they have disabled all support as none of my support requests are going through, even with omitting data and using VPN multiple times.. I've had seven unsuccessful tickets and was just brainstorming how to automate the requests.
Final Edit: Thanks for your responses everyone, looks like legal is the only route. After 24h my support requests are still being auto blocked (not submitting as there's no delay before response), and I am skeptical they switched off support for that long, even if it is fake, so they just blacklisted my details I think.

Yeah this is the cancer that is email 2FA.
Unfortunately email is the only way they have to verify your identity. No email, no account. But this is very much not exclusive to Rockstar.
I changed my email a couple of years ago and it's absolutely astonishing how many companies are completely unequipped to deal with someone changing or deleting their email account.
That isn't really true, I've restored access to multiple game accounts before in situations where I lost access to my email, it mostly involved providing information about the account that only the person using it would know, like the names of characters on it and some other stuff. If a company can't handle this it's because they don't want to pay for competent customer support workers and just rely entirely on lazily coded automated systems.
Yes, things like original email and Nickname are some of those questions because after they change the public might have no way of figuring it out. Notice the support tech asked for those informations and when provided with it he said that he couldn't verify ownership, this means OP reported wrong information for the identifying questions.
I'm not saying the service is great, asking him to access an email he claims to have lost access is dumb, but everything after that the tech support person did his best, and I don't think he should have disabled 2FA, since it could be a social engineering attack.
Oh, I see, didn't read the second image at first
Yes, it is the lazy way to secure accounts. No defense there.