I paid for a 1 month. Do I have to do something before it expires or will it be automatically canceled when the month is up?
No one here knows what you paid for.
If you paid for a subscription to something, then read the terms of the subscription.
In addition to what @browj2 has told you, you need to be aware that automatic cancellation of any Magix subscription contract is almost certain to not happen.
As John implies, it is wholly up to the user to initiate the cancellation, which can take 28 days to become effective. In other words, any cancellation may not take effect until 28 days from the date on which Magix receives the users' notice of intention to cancel.
If a further payment becomes due before those 28 days have passed, that payment will be due and will be taken.
Jeff
Forum Moderator