It says "Your Professional Trial expires in 15 days" but I wanted a free account

It says "Your Professional Trial expires in 15 days" but I wanted a free account

At the top of the CRM app it says "Your Professional Trial expires in 15 days" right after I signed up.  I wanted to sign up for a free account, not a professional trial.  I'm currently trying to evaluate the Free version but that's difficult to do when it's giving me a Professional trial.  Is there any way to turn off the Professional Trial?