Refund used to purchase Savings Bonds

I deliberately made an extra Estimated Tax payment so that I could apply part of my refund to the purchase of U,S. Savings Bonds.  All went well, and WMR confirmed that this would be happening.  But lo and behold, a deposit from the IRS landed in my bank account on the appointed date for the gross refund.  I waited a few days to see if it would be corrected, but it hasn't.  Getting through to the IRS is impossible.  Any ideas?  I hate to lose out on the current really good I Bond rate.