Hey there @Jerry Lotterhos - thanks for bringing this to our attention.
As a first step, I'd suggest using the look-up tool to identify the email address that's associated with the charge in question.
If you have further queries, you can then contact our support team through this form for further assistance.
Just make sure to use an incognito window without signing into any Dropbox account and fill in all the relevant information.
Keep us posted with any updates!