Organisers of a pop-culture festival in the city on Friday said they were offering a refund to people who bought faulty priority tickets this week for the event next month.

The mishap had to do with the popular K-pop girl group, NJZ, formerly known as New Jeans, who will be performing on March 23, the last day of the three-day festival.

But fans were left disappointed when the tickets they bought through Cityline had the wrong date printed.

ComplexCon Hong Kong said it was now refunding ticket holders who filed complaints with the Consumer Council, or made formal enquiries with ComplexCon or Cityline on or before Thursday.

"To apply for the refund, please send the valid ticket and the confirmation email from Cityline, using the e-mail account you used to purchase the tickets, to ticketing_support_0210@complexconhk.com by 5pm Hong Kong time on [Sunday]," it said in a statement posted on its website.

Organisers said the refund would not include handling fees charged by Cityline, and they were working with the platform on more details as to when the payment would go through.

ComplexCon Hong Kong said it reserves the right to have the final say if there are any objections and disputes over the refund arrangements.

Earlier, the Consumer Council said it had received more than 50 complaints over the matter, involving some HK$220,000.