HELP!

The blogger layout is insane! It won´t let me edit my template -and in my desperation the former layout was erased. Sniff, sniff. It gives me a code error that is positively annoying me very much. If you have any idea of what to do now, please tell me.
Perhaps I should also tell you that I even made a new blog to start all over again, but it won´t let me change the template even then.
p.s. Through the keys (hopeful face)!