Dropbox Just Ripped Me off By Charging me Three Extra Subscriptions

I just got an invoice from Dropbox to say I had been changed $830 for an annual standard subscription with three extra licenses. 

I cannot see anywhere on my page where I subscribed to three extra licenses and as an individual who wasn't even going to use the other two licenses that the standard subscription comes with, it is outrageous that they are changing me for three annual standard subscriptions under the guise of one subscription.

This is disgraceful Dropbox.  I have no idea how as an individual I am going to be able to afford $830 for three subscriptions that I don't need and seem to have no way of being able to be refunded for, as they are all conveniently bundled up in the one 'annual standard subscription + 3 additional licenses'.