Sends the client's complaint to Forbrugerombudsmanden (multipart/form-data: the letter in "file", the email's "subject" and "body" as the client wrote them, the "lei" of the company complaining, which must be one of the user's Danish LEIs, and optionally the "contactEmail" of the contact person). It is sent from the signed-in client's account email (also Reply-To), with a copy to the client, the contact person and Global FinReg, and the letter attached. Only for a letter this user analysed in the last LeiComplaint:AnalysedLetterHours that wasn't Global FinReg's own or an impersonation.