Hey AhriahMenard,
Can you let me know if you are able to sign in to your Call of Duty account? What is the exact name of your clan? When checking, I saw a few variations (B4F, B4F Crew, B4F Clan). Just to verify, the issue you've encountered is that you lost control of your clan? Are you using the Call of Duty mobile application?
Thanks,
^AJ