All my emails have dissapeared overnight! Please Help

I had a big shock today, as almost all my emails have dissapeared from my account overnight!!! Please help!!!!

Even the emails neatly organized in folders are gone.

I still have a few in sent items and deleted, but that's all...

I have tried restoring deleted emails from the deleted folder, but only a dozen or so (old deleted one) reappeared, nothing in the inbox or folders.

All my email correspondence history was in these folders, as I have only been using Hotmail.

I need these emails back, what can I do? Is there an Hotmail Hotline support for a formal demand?

Thanks!