How do I get my email back after I deleted my account? WAS:help urgente

I use Thunderbird. I was having problems sending and receiving email, contacted my server, he asked for me to delete my account and start over, I lost all my emails, folders, and still can't send or receive emails. He said the problem was not with them.

Can you help me get all my emails and folders back?
Can you help me fixing my email problem?

email me: cassia@impressionsdesign.net and cassiatatoboyd@hotmail.com