Unfortunately, there is not much you can do, what they received from your employer seems to be different from what was entered into your tax return. You will have to wait until the IRS finishes with your pay verification. Once the IRS opens back up & starts receiving phone calls again, you will be able to call them.
Right now keep checking the IRS website, Where's My Refund, for your information.
https://www.irs.gov/refunds