Tiger Airways has stopped selling domestic tickets and said it would refund fares to passengers holding reservations between now and July 31.

However, Australian Competition and Consumer Commission head Graeme Samuel warned that consumers may have to wait “several weeks” before getting refunds. He said their failure to warn customers that flights might not take off for an indefinite period. And in the latest for the troubled airline, chief executive Crawford Rix has resigned from his post just hours after the Civil Aviation Safety Authority said it would put forward an application to extend the airline’s grounding until the end of the month.

For current and would-be passengers of Tiger Airways, the next couple of days and weeks look set to be dogged by more uncertainty, with the aviation industry safety regulator saying it would apply to extend the airline’s suspension, originally due to end on July 8, until the end of the month. The decision has been spurred on by unfinished investigations into the airline’s safety records. So far discussion between Tiger and the safety regulator are focused on the competence, qualifications and training of the airline’s pilots. Tiger has been instructed to retrain its 100 pilots before it is allowed to resume flights in Australia.