How do I ask for help?

Settings > Help > Ask for help. Three fields: a subject, what it is about, and what is happening. Pick from A question, Something is broken, Billing, My account, My data or Something else. You get a case number, and the same screen lists everything you have sent with its number, its date and where it has got to: Received, Being looked at, Waiting for you, Answered or Closed. Replies come by email to the address on your account, so quote the case number if you write back.