I've got an account which I've had since around 2006, the email address was hijacked over a decade ago and I can't recreate it, I can't change the password as it sends an email and the email address can't be changed, and I have an authenticator on there that I can't remove if I wanted or needed to, which means if I ever have an issue where I can't access the authenticator my account is lost. I have gone through the "support options we provide." and it has never been helpful, always ignored or I get a bot reply saying "sorry we can't help" that looks a lot like "fuck off" to me.
The customer service has always been a joke, and the idea that being upvoted on reddit gets you help is less of an opinion and more of re-accruing reality.
I'm sorta just waiting for the day when I lose access to it forever.
Maybe you can help me out?
try this - https://support.runescape.com/hc/en-gb/articles/205982841-Your-email-is-old-inaccessible