How do I get my old blog back?

I am in real trouble. I decided to switch my blogspot blog to a Wordpress blog and found a plug in that redirects traffic from the blogger blog to the new WP one.

It involves placing some script in the HTML code of blogger. The instructions said to
click “Revert to Classic Template” option on Edit HTML which I did. There were no instructions as to where exactly to place the redirect code so I did not change it.

Now my blog appears as the classic template and I have lost a lot of stuff that was in the sidebars like my top health blogger badge. I cannot see how to go back to my original blog. Is there a way?

On the other hand maybe I do not need to get it back if I can find out where to place the redirect code that came with the plugin. A simple redirect won't do as it does not redirect blog post to the same post on the new blog.

I do hope someone knows.

Sandy