Cancelling My Sons Xbox Live Profile

Give the XBox Support folks in your area a call and tell them you'd like to cancel the account.

i can not ring them i just need to remove the profile and its live bann him or so

If I understand you correctly your sons XBL account is banned from XBL? If that is the case and it is a permanent ban then you can just go to the MEMORY TAB on your console via SYSTEM SETTINGS then go to PROFILES and just delete his from your console. Once you do that, he or anyone else will not be able to recover it since the account is permanently locked.

If the account is not banned from XBL and you just wish to remove it from the console the same steps above will work. If you have any Live time remaining on the account you may wish to call support for your region and tell them to cancel the account. At which time they will issue a redeem token (within 3-5 business days) for any Live time over 30 days remaining. You can then use the token on any other account.

If it's on a auto renewal payment then you'll need to phone support to get that stopped (it's a five minute phone call during non peak hours). As for his profile you can delete from the console yourself; sign in > scroll right to system settings > memory > gamer profiles > his profile > delete. Do be aware that if he knows the WLID & password he will be able to recover it so I'd suggest changing that to something that only you know ahead of time.

EDIT: Tem says it far better than I could.

its not banned i cant contact with phones

Sorry, but as said before, the only way to cancel Live on an account is by phoning support.