I let my Friend play my account.when i'm want to play it says you've been banned & reported i'm ask to my friend.he said he was shot his own team.please unbanned me.

It doesnt matter if it is you, a friend, child, dog or even a parrot(parrots will kill you in this game) who does the bannable offence. Its still you who is responsible for your account. I dont know if you have the same name in the game as on the forum but if you read the thread "Blacklist" maybe you can see what you have been reported for and what you have to do to get unbanned.
I hope this will help you.

We understand you didn't do it but it was your account and it doesn't matter who playes on it you, your friend, your sister, your mom, your son. Its still the account that gets banned not the person. As long as this was the first time it is only a 24 hour ban then you'll be back flying. Just don't let your friend play again

The Evil Chinchilla strikes again!

lol that old chestnut
Honest mister it was my brothers best friends cousins sisters half brothers pet tortoise.
Man up.Admit,appologise and say never again.