How to notify Dropbox when a user has died?

Hello, I need help!  My spouse, who passed away, used Dropbox and I have his log info.  When I logged in today, the account was empty - no files whatsoever. This is not an issue with payment, because I just saw the monthly charge on my credit card (but I don't know where to see the receipt for payment on Dropbox).   So 3 questions: 1) Why would all the files be missing and is there anyway to retrieve?  2) Where can I see the receipt for payment of tris account?  And 3), how do I close the account once I know if anything is still in it?  I tried to communicate with the Chatbot and it told me the info it needs for me to review and/or close the account of a deceased person.  But the link it provides in the chat takes me to a page where the options are "Chatbot" or "Community."  I.e., there is nowhere where I can upload information.  I really appreciate any help anyone can offer.  Dropbox has always mystified me so the clearer the info, the better.  Thank you.