Calling a female dispatcher an old B*tch will probably not get you very far as it will fire up the emotional part of the brain. Calling a male dispatcher an expletive probably would help somewhat to get your point across more effectively.

Again if this doesn't get you to far. Then a couple of questions to the dispatcher need to be asked;

'What is your name?'
'What is your Manager's name?'
'I need to speak to your manager, immediately'