How to get Xbox to respond and solve a customer problem?

I recently wrote Xbox because of a problem I was having with another LIVE user. I have been playing a game online and I ran into this person and immediatly he started using cheats (lagging, killing his team members, abusive language, etc…). I filed a complaint with Xbox as well as submitted a player review which is supposed to allow you to either play again with a person or avoid them so you won't have to play with them again. Well two days later I log back in online and there this person is again on my team doing the same things I avoided him for. Again I filed a complaint and avoided him. I then sent an email to Xbox who responded with exactly what I already did. I sent them another email about the problem and they just said "We take feedback about Xbox and our Customer Service very seriously and review customer comments daily. If you have any additional suggestions for new features that you'd like to be added to Xbox, please reply back to me with your comments." How do I get help

Writing to companies about problems generally doesn't work. Call support and demand something be done about the cheater.

http://www.xbox.com/en-US/support/contact/?WT.svl=nav