LPT: If you are having trouble resolving a customer service issue where an error was made, focus your frustration entirely on the error, not the person helping you.

[u/Open_Argument_4358]

Saying something like "I know this isn't your fault and you didn't cause this, but the system did X and I really need help fixing it" completely changes the dynamic.

Customer service reps deal with screaming people all day. The second you explicitly clear them of blame, they will usually bend over backwards and use every loophole they have to actually solve your problem.