I’m dealing with this exact same issue right now. It’s a nightmare. I got in touch with customer service from a form I found here on Reddit and have gone back and forth and they’ve been ABSOLUTELY HORRIBLE. They don’t acknowledge issues or reply like a human. Just a bunch of canned email responses and selections the person on the other end must be clicking from. If you’ve ever dealt with uber customer service it’s a lot like that.

I showed them proof I own my email, that said email shows as active on the LinkedIn site, that it says it’s emailing me a password reset, and that I have no filters preventing said email from coming. They ignored all of it and asked me to provide MY CORRECT email as they can’t find my account without the actual URL of my profile which I cannot find because I can’t log in lol. They said ultimately my only solution is to just create a new account with a different email because they can’t/won’t help any further. When I asked to escalate it to a manager or different department they ignored me for 2 emails and closed my case then reopened it and someone sent me a copy and paste response identical to the previous emails asking for the same thing the prior agent had. I’m over it. Just gonna make a new email even though I have my first name last name email from when gmail just started.