I recently had to get Asiana to cancel an online booking that was submitted to an unwelcome schedule change. The usual cancellation process wasn’t functioning.

You can reach them to make the cancellation using this online portal (same outcome as PICKLES)

https://m.flyasiana.com/C/KR/EN/customer/voc

It will take a few working days but you should get a resolution within a week.

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I’ll keep this up and hopefully it will save someone else from spending money and frustration languishing on hold (useless phonecall)