The IRS and two States have no record of my 2021 Taxes. I paid TurboTax and I have copies. I have been unable to get satifactory answers from support. Help?

Filing was completed on time, with no detected errors.  No red flags were raised until I received a recent notice from IRS.  Support told me this was all impossible and left me on hold for hours.  I am afraid to send good $ after bad since I did not get what I paid for.  I have used TurboTax for years, without problem.