How to stop phone call notifications on desktop

When I get a phone call on my Google Fi phone it also rings on my desktop which has Google Chrome and Hangouts running.

How do I stop the desktop integration? I never asked for that. TBH as a customer, it was never described to me that this was going to happen.

I've also had a bunch of weird situations where my desktop will ring but my phone will not, despite both devices being on the same WiFi network and the phone has compete coverage.

Thanks!