Scumbag British Airways and American Airlines

I made the mistake of buying a business class ticket with these fucks for my mother who wanted to visit me in USA from India.

1. They canceled my first flight and without much notice, which btw I found out when I googled out of curiosity and was not notified in any way

2. I had specifically asked for vegetarian food for my aging mother, about three months ago when I booked but was told that there was no food for her in the flight from Dallas, TX to London! Poor thing she survived on some chips.

3. She has knee pain, spondylosis, she cant walk very far - which of course british airways doesnt care about although we FUCKING PAID FOR THE PROMISED "BUSINESS CLASS" experience, was denied mobility assistance, was made to run to her next flight within minutes of reaching london airport.

4. DId not let us check in online, asked us to check in at the kiosk, but guess what, couldnt check in there either, and then since i hadnt "checked in", gave away our seat to someone else. Which we had to fight for in the last moment to get back and that too a shitty one at that.

5. Cherry on top - Our baggage was lost. We didnt get it when she landed in India.

TO what extent should a person actually "Expect" this shit ? how far does this go ? is there a fucking line where this stops ? 

I am screaming into the imgur void at this point.