Really sorry to hear that. One of my (American) friends finally got her permission to permanently remain today after a giant, lengthy battle and she's so relieved. I think those of us with settled / born status often don't appreciate how incredibly stressful, and expensive the process can be to move here.
Have you looked into any options other than sponsorship? Though, I wouldn't blame you for wanting to GTFO of here, the way things are right now.