how do you send a ban request when you see a hacker?

Server activities are entirely the responsibility of server owners / admins.
So; report in game.
If the server has a gametracker page, or it's own website you might try those.

Gametracker does not involve itself in the managing of servers.

An answer has been provided above.

Gametracker does not involve itself in the managing of servers.
Any further posts will be deleted.

abdullah_saleh wrote:

i am ban from cs.gajik how i would be unban
plz reply me early as possible

Find the server page and ask them