Cannot change plan to pro

Hello,
I cannot change plan to pro saying I have an unpaid amount. When I am going to pay $ 3.23 amount which is unpaid it’s saying less than $5 cannot be paid. Please help now

Try opening a Support Ticket for Billing:

To contact Cloudflare Customer Support, login & go to https://dash.cloudflare.com/?account=support and select get more help. If you receive an automatic response that does not help you, please reply and indicate you need more help.