Im thinking whoever submitted your site to the SE's has submitted the address wrong in the first place. Simple spelling mistake, [/,...] or htm instead of html or vice versa are common mistakes.
If this is the case you will have to start submitting from scratch with the proper url. Other SE's will stop indexing the bad url ...when they get around to it. You can also request for it to be removed from the index if you can provide proof that you own the site.