Odd that the guy did not know what weight of oil was put in; I'd be all over that. These days, a lighter oil would be most common, so not the likely culprit but just something to keep in the back of your mind as you go through this.
Took my truck to a "quick" oil change place one time, as it was pouring cats and dogs, and I was leaving on a trip the next day. I told them what filter I wanted (common large Mopar type filter), and 10-30 oil. I watched while they put the small Toyota type filter on and 5-30 oil. When they were finished and they told me to start the truck, I refused. Made them put on the filter I wanted, and drain the 5-30 and install the 10-30.
Them monkeys just don't pay attention.
PS: They also did not grease the ball joints, but did do the tie rod ends, and even the torsion bar anchors.