I called up a few times to chase. They CSOs were giving standard reply of up to 16 weeks from date of cancellation, 23 April 2020 for my redemption tickets travelling late May. Expect miles and refund notice in by August 2020. They say they are refunding the miles & taxes by months, March, April then May. I suspect it's because of cashflow problem because our tickets are all prepaid and they do not want to credit back the miles so fast to your account in case you make another redemption in the coming months and need to cancel again if you cannot travel.