Like many of the users on this blog, we took the 30-day free trial and ended up not using it after a few times. However, we were surprised to find that our credit card was charged $750 and immediately contacted Dropbox to ask for a refund.
Related: Dropbox Charged me 0 for something I don't want, need or have!
However, the company representative refused any partial or full refund and disconnected me from the chat room when I expressed my dissatisfaction and desire to file a complaint with consumers report. I find such after service terrible and the general behavior of automatic charging without any refund (even partial) to be fraudulent and unacceptable and encourage all to speak up against this company.