Refund by subscription downgrade

After several days of using the Business plan, I decided to abandon it. In the account settings I changed the tariff plan for Free, but money has not been returned to the card so far. How to be in this situation?

Open a Support ticket, login to Cloudflare and then contact Cloudflare Support

It’s the weekend, so it may take a few days for their billing department to get back to you.

EDIT: I just looked at their billing policy. You pay monthly, so you won’t get a refund for a downgrade: