You only get one free trial for an app. After that the subscription launches for its full term immediately.
- You may be billed immediately for a free trial if you or a Family Sharing member has already once had a free trial for that item. In that case you will see immediate subscription commencement information on the authorization page.
- You need to cancel free trials at least 24 hours before they end or else they may turn into a full subscription.
Refs:
- Legal - Apple Media Services - Apple Section I
- Posts by Apple Communities contributor “Mac Jim ID” at Charged after cancelling free trial subsc… - Apple Community and Receiving a call transcript from phone su… - Apple Community
- Apple Support Article: If you want to cancel a subscription from Apple - Apple Support
About the refund, here's a section from the U.S.A. version of Apple Media Services Terms and Conditions - Legal - Apple Media Services - Apple You can see if the terms are different for where you live by clicking on this link Legal - Apple Media Services - Apple select your location and then your language.
- "All Transactions are final."
Apple's terms of purchase in the USA are, "All Transactions are final," ( Legal - Apple Media Services - Apple section B), but check the terms for your country. Even if Apple does not outright say in a country that sales are final, they may say that refunds are only made to remedy defective or unavailable product. In other cases Apple may make limited refunds solely at their discretion and as an exception. Apple can also simply say no without having to provide a reason. I understand this can be frustrating but by using the service you agree to the terms.
If you have suggestions for improving the reminder, send them via the Apple products feedback links --> Product Feedback - Apple
Apple may not respond but your comment will be read.