I don't get what you Were trying to say to The admin at all.
You said if you See a hacker you are quiet?
What should that even mean?
To answer your other questions
You won't find those data in your client they are saved on The Server
I doubt you changed your Router mac adress that would require buying an entire New router .
Re-installing The game won't get you unbanned.
The only one that can help you is The admin him/herself.
And even if you got banned for no real reason just find another Server.