Looking at Demo 3, I can tell obvious wallhack on that DR kill. The way you were aiming at his place was so weird, I never seen a CT like that (unless wallhacking ofc). Also, why didn't you wallbang? That would be the obvious thing to do for most CTs.
Anyway, below are 2 demos which make you look suspicious aswell.
The first demo shows your constant aiming towards an invisible T hiding inside the cells. You kept aiming at his cell constantly, even though your teammate has already checked it. You were hopping for that T to leave the cells, so you can kill him. Few questions come up here, why did you keep aiming towards his direction? Why not the upper cells? Heck why not the other side of the cells? Or even the vent cell? Obvious answer would be wallhack.
The second demo shows you aiming with an AWP in a space day. The way you aim is very weird, you scope and search- which is very noob btw. Also, the way you wait for a T to show up on your scope (e.g. the T around the race near the crates). When most of the Ts died, you didnt bother to open the door to check for hidden Ts behind the cage. You completely ignored that. You kept pre-aiming at the other 2 behind DR.
1 more thing, on Forum chatbox, you said "time to move on, I dont care" and stuff like that. Why did you decide to do unban request then?
Edit: Demos:
https://www.mediafire.com/?71qmak1c8bvrczz