MY GOD! OIL IS A *RELIGION*, don't they know that?! That *WRONG OIL* will rot your perfect motor, corrode your frame, fog your instruments, flatten your tires, & make your seat lumpy! There's only *ONE* solution! They *must* replace your bike!
At the presentation ceremony for your new bike the service tech should be placed against the building & executed by a firing squad! The service writer must be fired, & the dealership burnt to the ground! How could they possibly think admitting a mistake & not charging you for it would be enough?!
Or, you could thank them for their honesty & just ride the damn thing.....