I was stuck between my wife in the window seat and a 400 lb woman in the outside seat, I had 1/4 of my seat to myself on a fully booked plane, and I have claustrophobia. This was on US Air and they did nothing. I didn’t fly again for 14 years.
That woman was assaulting you.
I sympathize. I firmly believe that fat sweathogs should have to buy two seats. I got stuck next to a 300 pound woman in the center seat of a flight from Chicago to San Francisco back when I was in the Navy. Not only did she stink, she tried to cover the stink with perfume and complained the entire flight.
I was actually ill for two days after that flight.