payusatax payment not showing to IRS

I made a large payment using the payusatax link from the IRS website last month (December 2020) and it is still not reflecting in my IRS account as of January 29,2021. Has anyone had a negative experience with payusatax? Currently I’ve been on hold for 20 minutes waiting to speak to someone at payusatax and 57 minutes from my other phone waiting to speak to someone at the IRS. Kind of freaking out!