Did you have 2800 on 1040 line 30 for the Recovery Rebate Credit for the 3rd Stimulus? Did you already get the 3rd Stimulus (1,400 per person) they sent out last year starting in March 2021? You each should also get IRS letter 6475 for half saying what they sent you. Line 30 is only if you didn't get the full amount or qualify for more.
If you claimed a missing stimulus payment on your return but the IRS took it off you have to ask the IRS. They think they already sent it to you. Maybe it went to an account you don't remember. Or you got a check or a card. It was probably easy to miss the debit card in the mail and think it was junk mail. They have to put a trace on it.
Double check your bank accounts and check your IRS account (both accounts if married) to see how much the IRS sent you.
https://www.irs.gov/payments/your-online-account
