Bittrex will close the JBS market at 00:01 on the 28th (PST). Jumbucks balances on bittrex will be automatically be swapped to Ubiq at a 1:10 ratio (1JBS = 10UBQ). If you have a balance of 1,000JBS pre swap, post swap you will have 10,000UBQ.
The UBQ market will not open until after the launch and the network has stabilized. The launch will be taking place on the 28th at 12:00 (PST).
I hope this clears up any confusion.
In regards to cryptopia, please withdraw your coins before the 28th. Either to an address you have claimed via the claim form, or to bittrex.