Lost admin-links can be retrieved here: Lost & Found
You can also access your poll under your Doodle account dashboard. Log into Doodle to see your polls. When you click on them from your dashboard you are taken directly to the admin page.
If you created the poll without a Doodle account and you mistyped the admin email, then unfortunately nothing can be done. The admin-link is lost. For the future we advise you to use a Doodle account. No more lost admin-links. You can open a free account here.