That is completely intolerable! If Bebo doesn't respond properly, try to contact WiredSafety.org who are in collaboration with Bebo. They should take more interest in your problem as violates their terms of policy or fear legal proceedings.
And reluctant though you may be, you will have to contact the police sooner or later. In fact, seeing Bebo's responses and actions, you would be better off with police assistance. It might attract unwanted media attention but then its a choice between justice and privacy. If you are unsure, talk to your daughter and ask her which way she wants to go.
If you decide to move on with the incident, just make sure that Bebo has disabled your account and video and any information related to you. After your bitter experience, it is better to discontinue using their service.
Sorry I couldn't be of more assistance.
-- Goku