You are not alone, had the same problem this morning. 7-11 staff keyed in the ticket number and message No Ticket came up. I have now Emailed Pia and they replied quickly and am said not to worry as ticket is confirmed. Then asked for more details, waiting for another reply. Like you the staff at 7-11 were very helpful, even when a queue started forming behind me. They could not understand why the ticket would not print. In the past when collecting tickets, it is a quick and painless process.