If you are still in need, I’d recommend Mumble, a Team-Speak look-alike free and open source audio conferencing system. You need a dedicated server (the server’s free and open source as well, so one can self-host it if the connection supports it), but it has very good sound and some nifty features (i.e. directly voice-chatting to people while the rest of the channel does not hear it; good for GMs ) while having a VERY low traffic profile.
Guys, I SO much feel you! COVID-19 is the only reason, why I actually play online. I had my first trials of online groups years (almost a decade, I think) ago, and even though technology did improve since then, it’s still not the same. For the last years, I have resisted online play for the reasons you mention, it’s just not my cup of tea. That being said, we’re trying to get the best out of the situation and now we have very immersive battle maps (with D&D) and actual line of sight/fog of war. That’s something.
I also hate webcams. I do not need to see the guys I work with in a conference. Most of the time, I’m looking at a text or a browser window, anyway. So, at work (I am one of the lucky persons who actually can work at/from home) I do not regret that my laptop has no camera, not for a single moment. I actually did, when we started playing online. Facial and gestural expressions are so important!
Anyway: I’m glad it helps you through these turbulent times. Better than nothing.