1. Add the bot to a new channel: 

Type @LEAD.bot in the channel you want to invite it to, then Slackbot will send you a reminder to ask you whether you want to invite the bot to the channel, click “Invite them” as the screenshot shown below: 

2. Delete the bot from a channel: 
Type @LEAD.bot in the channel, click the bot and choose “Remove this app from XXX channel” as the screenshot shown below: 

3. If you can not find the removal option in your Slack, you will need to talk to your Slack admin, likely to be someone in the IT department of your company to help you with the issue.