More formatting needed on inline thank you message

I simply couldn’t believe it when I saw the thank you response. After filling out a lovely input form as a pretend user, I’m then directed to a thank you page with

HUGE

black bold unformatted text that isn’t even left-justified (as I had formatted it to be). It looks like I’ve suddenly landed on an amateur website my youngest kiddo designed.

Given the date of mrspabs request (April of 2019) — nearly a year ago — I’m stunned such a simple fix hasn’t been implemented by now. How can we escalate this to the right channels to implement a fix?