$2800 sounds like it could have been for the 3rd EIP payment. Did you incorrectly say that you did not receive that payment of $1400 per person last year? You cannot get the 3rd EIP payment twice. If you said you did not get it, but you did, then the IRS reduced your refund. Check your bank records to see if you had deposits of $1400 per person.
Or check your online account' https://www.irs.gov/payments/your-online-account
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**