If I may be a touch blunt, some of your club sound like idiots.
There are good and bad clubs out there, or more often some are a better fit than others at this point in your diving development. More specifically, taking someone's phone and shooting into the history then playingit up is not appropriate behaviour, and I'm comfortable enough they'd be in no uncertain state in my view on their behaviour, probably resulting in a club suspension if they did it to me. But I'm well established in my club and happy enough to upset people if I need to.
I'm going to guess you're not English first language being from China, and in a northern English bsac club. I'd say the behaviour you're describing is bullying. I'd suggest it's pushing on being in breach of bsac Code of Conduct point 2 i, Edward might have a view as Chair. A new member presents, describes other awards and the club membership is disparaging.
From what you are saying you gave them an option on your attendance, they agreed it and off you went. My suggestion at this point is that this club is not for you.
Unfortunately, put it down to experience and move in. Maybe in bsac, maybe out. Other clubs are better at fitting what you're looking for. The UK GUE scene is generally pretty welcoming and hopefully you'll find some buddies there.
Good luck.
Rich