Was 2800 on your 1040 line 30? If the IRS reduced your refund they will mail you a letter. Check IRS Where's my refund to see what they sent you.
https://www.irs.gov/refunds/
The 2 most common reasons is you entered the wrong amount on line 30 for the Recovery Rebate Credit (3rd Stimulus payment) or line 28 for the Child Tax Credit. Those lines are just if you didn't already get the full amount or qualify for more. The IRS knows what they already sent you.
A lot of people answered the questions wrong and tried to claim the credits again. Double check your bank statements and Check your IRS account to see when and what they sent you (check both spouse's accounts if married)
Your Online Account | Internal Revenue Service
If the IRS thinks they sent it to you but you didn't get it request a trace for a missing third Stimulus payment
https://www.irs.gov/newsroom/questions-and-answers-about-the-third-economic-impact-payment-topic-j-p...Your Online Account | Internal Revenue Service
