Lost Tax Filing

I received notification from IRS that they did not receive my 2024 filing which was submitted via Turbo Tax March 1, 2025. Checking my TT account, which shows a filing was completed, I printed the 1040 forms from the site and have now mailed a copy of the paperwork by Certified Mail / Return Receipt to IRS. I've been unable to get a response from Turbo Tax customer service (I use the term loosely) to enquire why the taxes were not officially filed.