CXC is trading as CXCDA (Deferred Settlement) as of today, and back to CXC by June 10th.
The CXCDA units, as from today, are at the 1:10 price. In other words, you will have 1/10 the number of shares that you were holding, but the price per share will be 10 times higher.
Brokers like CommSec handle trading in DA shares by phone, not via their website or trading platform.
Hope that helps :)