2 year / 12k mile service on a 2012 RT LTD with only 29k miles

I'm the owner of a 2012 RT LTD with now 29k miles on it. At 28.8k miles my "check engine" indicator and the "orange check engine" screen followed on the infotainment system. So I made an appointment that followed three weeks after my call. Long story short. Is there anyway of checking the legitimacy of the tech at the dealer? I asked because I'm having to take my Spyder back for the third time to the dealer I initially dropped it off with because both indicator warning are back on after 70 miles of riding. First I'm charged $830, then $288 that included them waring out my battery and for replacing my rear wheel bearings. Any and all responses would be appreciated.

The 3 wheeled traveler
Denver, Co.

Any codes? Waring out battery:dontknow: & a certified tech will have their certification displayed somewhere.(they passed a test :roflblack:)Rest is up to reviews & personal judgment.