Its depends on the situation and who it is.
If its a friend say:
Are you rushing me? Because I feel you are rushing me. If you don't want to talk now, perhaps later. Let me know!
If its a sales associate or a customer service representative, tell them:
Are you paying my phone bill? Uh, no, ok! I am a customer and I think its unprofessional that you have the nerve to rush me! I will like to speak to someone else please and thank you!
If its a stranger say (if you're at a phone booth or public place) say:
I am saying this as politely as possible but mind your business and leave me alone.
If its someone U HATE SAY:
FU BITCH U WANNA FIGHT
THE LAST ONE WAS A JOKE HAHA......... HOPE THIS HELPS