So a special levy for a project has been approved, but not the project.
If you have allies then you can request a general meeting to rescind the special levy. You will need a quarter of the unit entitlements to call the meeting. Do you think you can do that? If you do, I would get a move on before the levy notices are issued.
Another avenue is to ask the SM for details of the voting on the special levy, to determine if it was properly done. The resolution may not have been properly passed.