That's not possible. - It is possible because he has multiple facebook accounts created and One team is one account
It is legit to have as many accounts you want. - how is this legit to have many accounts just to support eachother and make it unfair to others ? Legit is when you can have no more than 2 accounts.
If someone report this, you can be banned. - wait what ? Im getting banned cuz someone has multiple accounts ? kappa

So the conclusion is if someone has multiple accounts can be banned right ?
And where do i write a ticket to SUPPORT STAFF to tell them who is this guy and the proofs i have to take actions ? ty