I see you have already contacted support regarding this and their response is correct. For security reasons they cannot send a link to reset an account password to another email address.
If you are trying to get into existing Repls on your other account you are able to fork them if they are public. I think this would be the best way to get existing code into a new account that you are able to access.
If the issue is that you cannot log into your Google account then I’m afraid you will have to contact Google support for help here. You said your email is filtered so I am guessing you are using a work / school Google account that has email turned off. If this is the case your work / school should be able to reset the Google password for you.
I signed up with Google, and I had the same issue. I wanted to change the email I signed up with, but it needed a password. I was told to use https://replit.com/forgot, but because of filters set up by my school I couldn’t receive it. I was able to contact an admin, and they changed it using your clui mutation. Can’t that be used here?