Two accounts using the same email address for personal account

I have a personal paid account. When I went to create a meeting via google calendar and include zoom info, it said I had to log-in. I logged in with my email and password - but it said the password was incorrect, so I sent a password reset email to myself. That one said I had to log in via my google account on the log in page, so I did that. But then when I went back and tried to add the zoom meeting to the calendar event it said that I had a free account with a 40 minute meeting length - so I look at it on the zoom website and it's got me listed as a free user. I logged out, and tried logging in again with my email and password, but it now says I have to log in via gmail - and thus I'm stuck in a loop where I can't actually log in to the account that is paid (I double checked that the email I've been getting my billing info is the same address as the one I logged in with both previously and now via gmail). How do I get these accounts merged, or how do I delete the free account without losing the account that I've been paying for for months?