I have removed the user, but still paid for the license, and no refund can be applied.

I will start off by saying I fully understand I made a mistake.  I didn't realize when I deleted a user that the license was not deleted as well.  Since I manage the users but do not handle the billing, I was unaware that we were paying for about 20 licenses that we were not using, this went on for about 4 to 6 months.  I did reduce the number of licenses to match the number of users and that will take effect on our next billing cycle (we are monthly).  I did reach out to billing support and honestly, it was such a cookie-cutter response, I might as well have been talking to a chatbot.  Per their policy, no refunds, and no one else I can speak to regarding the issue.  I get it, I am by no means entitled to any sort of refund, but we spent around 3 grand for licenses that we didn't use.  If I delete a user in Slack, my total billable number of users goes down, if I delete a user in Google, my total billable number of users goes down.  I was just surprised that Dropbox didn't work like that.