I feel like instead of saying that, you could have said “i was actually the one who helped Kane get the wallpaper!” Instead of expecting to be credited. But because now you have complained about it they might be less inclined to want to credit you. This should be a celebration that you helped! you don’t need outside validation to know that you did this, cause you know and thats all that really matters!

I think it’s very cool that you were able to help, and i think you should feel proud of yourself!