Firstly, thanks for your swift reply.
I guess it is inevitable that I'd have to do this each time, so here goes.
1) sniper kill - it was a random shot.. so many players there.. i just had to shoot to hit one. Plus, if I was wallhacking, would I actually rush out the door knowing that there are 5-6 players who would kill me? Which they did in the demo, of course.
2) T base - As you can see, I was shot dead by "syko" from the side, if I had wallhack, would I leave myself exposed for him to have a clear shot at me?
3) A door kill again - yet again, I rush and hope to catch some player off guard. Call it instinct call it luck, I saw a player there and I took the shot.
Throughout the whole demo I was getting killed, having a bad game.. Hence I was kinda surprised as well when I got banned this time round. Still, I respect your decision. I've laid my defence. It's up to you guys now.
Once again thank you.