I've been dealing with banks, telehealth, and CRA a ton these days over the phone. I guess a lot of others have too since the hold times have been ridiculous. I built a little tool that waits on hold on my behalf and calls me when an agent is on the other line. It's saved me some time so I thought I'd share it with others: https://youcallme.io
I generated a few quick access pages for the worst offenders too: e.g. https://youcallme.io/wayfair https://youcallme.io/chase-bank https://youcallme.io/jetblue-airways https://youcallme.io/walmart and a bunch others.
Would love to hear if you find it useful for yourself