Before reporting a forfeit win, you need to wait 15 minutes in the scheduled server. After that delay, use the .reportffw command to start and after that use .confirm in order to take the win.
Please note that in order to prevent your opponents from taking the win your team will need at least 4 players ".ready" in the server at 15 minutes past the scheduled time. If a team has 4 players they can use ".start" to begin the match with 4 players instead of forfeiting the match. You must proactively type ".start" to prevent the other team taking the forfeit win, simply having four players ".ready" is not enough.
Please note that in order to prevent your opponents from taking the win your team will need at least 4 players ".ready" in the server at 15 minutes past the scheduled time. If a team has 4 players they can use ".start" to begin the match with 4 players instead of forfeiting the match. You must proactively type ".start" to prevent the other team taking the forfeit win, simply having four players ".ready" is not enough.