Unauthorized alignment?

I'm so pissed. Took car in for alignment, asked if it need all 4 wheels done and he specifically told me that no, that's only on 4 wheel drive cars. So I made an appointment for front end alignment.... cost $49... all 4 would have been $75. Went to pick it up and they did all 4 anyway. Is this right? do I have a right to be pissed????