what happened to linked accounts?????

I can't access my linked account. The only answer I found was to log out of main account and log into the other one separately. It doesn't work. I had the same password for both of my accounts (since they were linked, I never had to enter it twice). Now, when I enter my linked account email address and password, I get an error saying that password is incorrect. I tried resetting it but it also doesn't work. I used that account for professional and work related emails and I need access to it asap! Could they have deleted linked accounts??? It seems absurd!