Godaddy is more than likely asking you to file a legal dispute with one of the following icann approved arbitrary firms listed here:
https://www.icann.org/resources/pages/providers-6d-2012-02-25-en Choose a firm, file your dispute documents, And then forward that document (after filed) to godaddy at:
[email protected] Once they receive the forwarded filed document they can then freeze the domain pending the case ruling.
Hope that helps,
Eric Lyon