@Barry2021,
Not this, again.
You don't want to listen to anybody for any reason. Sure, go ahead and glorify a Customer Service phone rep all you want, but let's get real here, you ARE a Customer Service phone rep. This is your J-O-B. It's what you get paid to do to earn a paycheck. And you got nailed for poor service.
A customer just didn't call back because they had additional questions, they called back specifically to complain about YOU. You took a mundane and simple call and turned it into a personal rant. You think a colloquial is somehow a personal attack and it's not.
People have told you to just get over it, not because it's not bothersome (because it is) but because you showed a lack of professionalism that's warranted for your customer service position.
Your rant about doctors, lawyers, pastors and the like, well, they've earned their titles and if they get called "sweetie" or "darling" or whatever, they shrug it off and go on. As you should too.
All you calls are recorded and monitored so you should expect Management to pull that call and listen to the exchange. It probably rises to the level of an eye roll and nothing will come of it.
Your complaint with your co-worker is silly. It's not easy taking heat for a co-worker. You're not understanding what that person's call was like, having to listen and respond to your unprofessionalism.
Drop it.