Problems with W-7 and Passport

My husband has an SSN and I don't have one so we mailed our tax refund with W-7 form and my passport (to get me an ITIN). We mailed it to Fresno California IRS, afterwards I found out that we should mail it to Texas office. So now 6 weeks passed and we didn't get any refund, our status on IRS site is unknown. What I need to do to get my passport back?