I would phone someone - anyone - and get put through to the right person at Nokia. It's easy to ignore emails, it's more difficult to ignore a phone call. I think legal action is a hammer to crack a nut and I'm sure you must be able to contact someone at Nokia that will accept responsibility for what has happened. I know when I sent my N800 in for repair I had no contact details other than the generic "Nokia Helpline" email address and by hook or by crook I managed to track down the phone number for the group within Nokia responsible for my repair (I'm in the UK so can't help you I'm afraid). Did you receive any paperwork with with phone numbers in the envelope that should have contained your N800?