hmm.. i have no correlation with the the company you mention, but your attitude is one of ignorance.. point a- you should be thankful that they take the time to inspect your vehicle. after all, the oil change probably takes half an hour (including filter, but highly variable with make/model)..so think about it.. they could double their turnover by giving 'just what you paid for'.. point b- did you even go to the trouble of verification of the issues found?..if not, i strongly suggest you do before you cause harm to your vehicle, your good self, or others.
To reiterate 'for the record', i am in no way associated with said company (i reside in Australia), but as a qualified Mechanic, i feel this needed to be said.