Sion building in halifax

why has this building been empty for so long ? . The original Sion Congregational Chapel was an Independent chapel built in 1819, with seats for over 1000 and a schoolroom in the basement. New school buildings were added in 1846 and 1866. David Livingstone gave a sermon and a lecture here in 1857. In 1959, the chapel and the school closed. The building was dismantled in 1984 and rebuilt with the facade included in the new Halifax Bus Station. it would seem nobody wants to let it .