The worst customer experience with British airways

I traveled from London on the 14 October 2023, whilst at the boarding gate we were told that there is a "slight" delay of 45 minutes, an hour later they said that they are still fixing technical issue, that was around 10h30 at night, subsequent to that, it was said the plane is night stopped and we must pay for accommodation the submit claims afterwards! My question is, what if I don't have money? The staff was so rude, sending us to terminal 3, yet they don't have a clue on what we will find at terminal 3. I will never, ever fly British airways again. The next day, we wanted to go to the lounge, security could not allow us because our tickets were not cleared. What an inconvenience? To top it all, the morning staff said they do not know anything about the nightstopped flight!!! By the way, their negative attitude and rudeness is at the highest level. Never again