microsoft / xbox contact

Hi,

     I can't seem to find a contact for microsoft / xbox security. I have some punks ddos'ing a customer of mine and I'd like to see if those folks from xbox could help us out here.

Thank you.
Mike

Replied offlist.

Mehmet

I've had the same problem with several customers in the last 6 months. It's
always someone playing games on Xbox live. I have one (extremely angry)
customer that we've blocked the Xbox live ports on, as somehow within
minutes of signing on he'd be the target of a >1 Gbps DDoS.

I'd never thought to track down someone at Microsoft about that, so now I
feel pretty dumb asking about the same contact info, if anyone would be so
kind?