If your IT department blocked LEAD.bot from the start, it is likely that they have the setting to not allow any third-party apps.
Please ask them to change the setting by following this Microsoft Teams’ guidance: https://docs.microsoft.com/en-us/microsoftteams/teams-app-permission-policies
Although Lead Tech, Inc. graduated from the Microsoft Startup Program and Microsoft is currently a customer of LEAD.bot, LEAD.bot is a third-party app launched in Microsoft Teams App Store by Lead Tech, Inc.