​
Text Channel Permissions

Usually, if members are still able to send messages in a text channel after being muted, it is likely because of the @everyone channel permissions being set incorrectly.
1

Set the channel permissions

Go to your channel settings, and navigate to the Permissions tab. Find the @everyone or member role and ensure that the Send Messages permission is set to Neutral (/).
2

Check server wide role permissions

Go to your server settings, and navigate to the Roles tab. Find the @everyone or member role and ensure that the Send Messages permission isn’t enabled.
3

Check for role overrides

Check if there are any roles that have permission overrides for the channel in question. If a role has the Send Messages permission enabled, it will override the @everyone permissions and allow members to send messages.

​
Lockdown Command

If you have a custom member role instead of the default @everyone role, make sure that the lockdown command is set to restrict that role instead of the @everyone role.
The steps above are also required for the lockdown command to work properly.
 
,lockdown role (role)

​
Voice Channel Permissions

If your VoiceMaster channels aren’t working as expected due to permission issues, you can use the category to manage permissions for all channels within it.