I received an email that my payment could not be processed. That was understandable, since the payment last year was aroud the same time. therefore I processed it manually from a correct bank-account (the other one was not working anymore).
However, if I look in my dropbox account, I don't see the payment processed + my account was downgraded.
I immediately looked at the receiving back account (beginning with: NL51ABNA05656XXXXX) and noticed that more people on google mentioned the back account number with suspicious activity, though it is sometimes hard to tell from google what is true or not.
I like to get in contact with Dropbox billing so I can solve this. Because if it was spam I have to get my money back. Plus, I like to restore my 2 TB box !