Being an old timer here, I am aware of the sage old advice of if you don't get your way the first time (but believe you are legitimately correct), you should hang up and call again to get a different agent.

I understand that and have done it myself.

Perhaps, this is an insider question....is every call you made into res logged and notated on your PNR? That is, would an agent know that you just called 5 minutes earlier to ask for some type of change or access to a given PNR?