I am sorry for your experience but I actually laughed.
I try to tell people that pay for oil to change to at minimum check the dip stick before driving off.
Even further, I had TWO experiences of the dealership f'ing up my oil change. I had oil changes included with my plan and both occurred in the early years.
1st time, I was driving after the dealership and saw a cloud of blue smoke coming from under my hood. Pulled over as soon as I could safely, and checked and found the someone only loosely put the dipstick back and oil was spraying from it. Luckily I caught it, but I was carefully cleaning my engine for months after that to clean off the oil.
After that, I ALWAYS checked both the oil cap (I actually put my cleanside separator on, I only put the oil cap back on temporarily when I go in for an oil change) and dipstick.
And sure enough, a few months later, after another oil change at the dealership - I checked under my hood BEFORE even starting the engine. And sure enough, some bonehead entirely forgot to put the dipstick back in. Just laying in the grove in the engine bay where the hood closes. Since then, it confirmed that I MUST check under my hood BEFORE I take off and drive if I have ANYONE change the oil, except me.
And, when it is winter and IF I come due for an oil change, I will use an oil change place (not the dealership) and again, double check everything before I leave. Even then, I caught one place put in the WRONG oil (5w 20 Semi-synthetic - even though my oil cap clearly says 5w 30 and I specifically requested FULL synthetic Mobil).
That time I was SO angry, I didn't even bother going back to that place. And did my own oil change, in spite of the cold, damp weather. It just made me swear more, while changing my oil.