Since you've already filed, there's really no way to change the account information. What will most likely happen is that the bank in Louisiana will deny the refund, since your information would be incorrect. The refund will be returned to the IRS, then they will issue out a paper check to the address on file.
Please allow an extra 10-15 business days for the check to reach you.
If you can, call the Louisiana bank and make sure they are aware they need to deny the refund, and then you can call the IRS to track your refund.