It kept getting rejected saying that the AGI didn't match
Any number of reasons for that. Did you mail your 2019 returns to the IRS? If so, it's perfectly possible they have not yet been processed by the IRS. That's the same reason you might be getting that 'Non-filer" status too.
When it comes to paying the IRS (if you owe) they don't always wait for your tax return to process, before they cash the check or make the ACH withdrawal from your account.
There's really not anything that TurboTax can do to help here, as they have no special relationship with the IRS on such matters. I assume you do have solid proof that you mailed your taxes to the IRS. If you e-filed, then I assume you have that Electronic Postmark printout that states your e-filed return was accepted by the IRS. Don't lose that proof. You may be asked to provide it, as you work this issue through with the IRS.
All you can really do is keep trying to contact a human at the IRS. Best of luck with that, until after the Apr 15th tax filing deadline.
I'm sorry I can't provide any "uplifting" information or help here. It is, what it is.
