You can change your billing day at: account.viaplay.is/changedate
You can only change billing day to today’s date, e.g. if you want to move the billing date to the 25th of each month, you must make the switch on the 25th. We then cancel your current subscription and start a new one automatically at that time.
You will be charged for the whole upcoming month and also receive an automatic refund for the remaining days of your previously paid package.