You asked for a bathroom break, it was approved, and then you were kicked out. I don't see any compelling reason for being kicked out of the raid. The raid leader was banned.
You can sell unwanted items to other vendors. The BG pet was fixed due to the incorrect behavior you mentioned. In general, exploiting bugs is a violation. Next time, report the bug instead of exploiting it.
In the evening, a promo code with an error was published, which was deleted a minute later. Then, the administrator sent another promo code. This code had 30 activations, and no player had any problems activating it. You probably didn't have time to activate it.
The strategy calls for one physical damage dealer and one special forces driver to tank the twins in first place. You failed to follow the raid leader's instructions; your task was to wait for the warrior to teleport and then aggro him. Your actions resulted in a wipe, and the expulsion was justified. If you continue to create threads blaming other players when you are the one at fault, I will issue a character ban under section 4.6. This is my final warning. Punishment denied. Enjoy the game.
You received warnings and then a ban. You should communicate more politely and avoid misinforming players with loud statements directed at the administration.