Hello recently I have been getting only like 5 messages and then it gives me the message that I'm out of messages and need to try again at 9. I have the free version but I think when I started I got at least 15 messages.
Please let me know how I can solve this.
Hi, Benjamin! Welcome to the Vercel Community 
From the relevant v0 documentation:
No worries! If you subscribe to Premium, or Team or Enterprise, you automatically get a higher message limit. If you're already on a Premium or Team plan, you'll have to wait until your 24-hour rate limit resets.