I'm a ball of rage over my pediatrician having to drop their contract with United due to some disagreement, as we really like our pediatrician. I kind of don't care if it's actually the office's fault at this point; I'd like to direct this anger over bullshit affecting the care my kids receive at them while I'm still motivated. It's probably not going to help, but what is the most effective way I can badger them, pester them, inundate their support lines, etc to get back?

Or, y'know, diplomatic means if it'd actually help?