Official game support is at Support.GearsofWar.com
Give as many details as you can. If you only say "My multiplayer doesn't work" we cannot reproduce the issue and we won't be able to fix it.
For the best results please try to answer as many of the following questions as possible:
- What platform are you playing on?
- What were you doing leading up to the issue?
- Have you been able to reproduce it yourself? If so, with what steps?
- If you play on the PC, please provide your hardware specs, OS, and GPU driver version.
- Include screenshots/pictures/video whenever possible.
- Pay attention to updates - find them at https://www.gears5.com/news