I keep receiving emails about being over-quota, but there aren't any files on my account.

I receive emails from Dropbox telling me my Basic account has reached its limit; however, when I log into my account there are no files there. I have searched in all folders, there is nothing there. I have also tried to locate these files using my laptop account and there is nothing there.

I cannot respond to their emails because it's from an unmonitored mailbox. I cannot call Dropbox because I have the free edition, and their free customers aren't treated with the same care as their paying customers. How can I resolve this if I cannot speak to a live person about it?

I'm tempted to reach out to our state's attorney general to file a complaint. This is just bad, bad business.