What would you have done?

1st

Yes you were out of line when you did not ask to talk to the gm face to face. Instead of calling him when you got home when that 6unt at the front desk told you tuff shizz!

But as far as: There never was any mention of how many in a one year period. It said free oil change's for one year. That is there bad! Come on really cars are driven and used for commute put something in writing or have that get abused. Good thing they honored it.