This just happened to me today and the money was supposed to be deposited today. I called my bank and they said the other account number was invalid and that they reject it and correct it themselves and will deposit the money either later today or tomorrow morning. They said they always double check the names on the returns and if they don't match then they put it on a list, internally, and correct it themselves. They said very rarely do they send it back to the IRS.
My advice is to call your bank ASAP and explain what happened. They CAN fix it the same day. As a matter of fact just as I was typing this, my bank called back (not even 5 minutes after I called them) and it has already been corrected and will be in my account within the next hour or two!
So CALL CALL CALL your bank!!!!
