confrontation

i have a fear of confrontation or the perception that confrontation will happen. recently i was in a business deal with an person and it felt like i was getting charged too much for the service i was purchasing.  .we have done business in the past and the prices for the same service was now much higher - to the tune of $600. now this person is a stickler to policy and i was focused on following the guidelines he had sent me. then i got the bill. really, $600 more and no explanation? i took a deep breath, sent a note and that asked him to explain. his was response stated that i had to ask for a special deal. huh, this was not a special deal. i was confused.  in the same response he also said he would credit me back the  $600. i could have responded with the "no where does it say i have to ask for this special deal"...but instead a simple thank you was what i gave. i got what i wanted and nothing more was needed.
lesson learned. don't anticipate how the other person is going to respond. act on what i feel is right and do it with honesty and integrity. i can't control how the other person will rill, only me. and hey, it was worth the 600 bucks.