you may be able to use form 4852 to report the correct amounts for your w-2.
note that the IRS may contact you to get the name and other info for your employer so they may contact them
here's from the form
You must take the following steps before filing Form 4852
• Attempt to get your Form W-2, Form W-2c, or Form 1099-R (original or corrected) from your employer or payer before contacting the IRS or filing Form 4852.
• If you don’t receive the missing or corrected form from your employer or payer by the end of February, you may call the IRS at 800-829-1040 for assistance. You must provide your name, address (including ZIP code), phone number, social security number, and dates of employment. You must also provide your employer’s or payer’s name, address (including ZIP code), and phone number. The IRS will contact your employer or payer and request the missing form. The IRS will also send you a Form 4852. If you don’t receive the missing form in sufficient time to file your income tax return timely, you may use the Form 4852 that the IRS sent you to file with your return.
not the word "may" in the highlighted line
trying to get through to an agent on the number is difficult.
