The rollover period is 60 days not 365 days. You can revoke an IRA within 7 days of setting it up. If it is beyond 7 days and the rollover was an error due to incorrect information then you can withdraw it from the IRA as an excess contribution. You will need to complete an IRA distribution form to make the withdrawal. You may have to withdraw the earnings (if any) on the rollover depending on when it occurred. The following link provides more details.
See page 10 regarding revoking and page 51 regarding excess due to incorrect rollover information - http://www.irs.gov/pub/irs-pdf/p590.pdf