On the day you got the response, how many days was it until the scheduled service appointment? I've found they will only begin to look at the T-14 days mark based on my last three times scheduling via the app.
And in your case, getting an answer to your question on the first message is pretty good! My current dialogue has gone like this...
Notes when scheduling appointment at T-16 days (under the category of Touchscreen, since it is leaking adhesive): "Please provide quote of MCU1 touchscreen and eMMC daughterboard replacement vs Infotainment Upgrade. Thanks."
Tesla response at T-14 days: "The Infotainment Upgrade is $2500 before taxes and can be delivered in time for your appointment, let us know how you want to proceed."
My reply 4 minutes later: "Thanks, for comparison please let me know the estimate to replace the MCU1 touchscreen and eMMC daughterboard."
Tesla response the next day: "Daughterboard estimate is $500 before tax.
My reply 50 minutes later: "Primary concern is MCU1 touchscreen leaking adhesive, so what is the estimate for an MCU1 center touchscreen replacement and eMMC daughterboard replacement at the same time? Thanks."
Still waiting on the Tesla response (now at T-12 days to the scheduled appointment).