Better locate your paperwork. What service was performed?
It went in for multiple problems;
Front suspension groans every time I go over a dip in the road at low speeds. (dealer says they found nothing, but never took it for a ride)
Front park assist keeps shutting itself off even though I am going under 5 MPH. (dealer says I shut it off)
Lane departure assist keeps going on and off at highway speeds with clearly marked lanes. (dealer handed me a printout of how the system works, again never took it for a ride.).
My EV range has fallen from 38 miles electric only range to only 23 (dealer says that I am mistaken, 2014 Volts only get a maximum of 23 miles of electric only charge).
When the engine is used I get the smell of burning rubber that will even come into the car when stopped at a red light. (dealer says I am mistaken there is no smell or anything wrong, and once again they never took it for a ride).
My infotainment system locks up and I cannot change anything, the screen it is on and all adjustments ie. volume, channel, climate, etc. are locked out. Sometimes the rear camera will stay on as I start to go down the road. People on this site have had this happen and have said the dealer had to do an update to take care of it. (dealer says I am mistaken, the infotainment system is fine and not locking up and that there is no such thing as an update for it.).