How to expunge email used on trial so I can use it in my current account (it's my new business email

I have had Adobe Acrobat for years and used a personal gmail to open the account.  What I MEANT to do recently is update my account email/sign in from that gmail to my business email.  However, what I DID do is start a "trial" with my business account so now it's "in use" when I try to update the correct account.  

Any help appreciated!