You can only lodge a complaint about a team chat violation if you were part of the team!
After the battle is over, go to your battle chat log (i.e. http://www.heroeswm.ru/battlechat.php?warid=XXXXX), locate and copy the unique 'Report to Keepers' link, and include it with your complaint.
Let me reiterate: Do not include the battle link in your complaint. Only include the 'Report to Keepers' link as described above.