I must disagree with you. Your post count total shows this is your first post.
If your problem with the smiley happened while making this first post, then we have no way of restoring anything as it never made it to the forum, and as such, nobody deleted anything from you so there is nothing to put back.
You are certainly welcome to continue to seek advice and solutions to your computer problems here.
Please state the Make & Model of the computer as well as any other information that may useful to those offering to help.