Yes, you get a refund. The amount of the refund depends on how long you’ve had Prime. For example, if you cancel after more than a year, you’ll get an entire year’s worth of Prime membership fees back.
No, you can’t cancel your Prime membership anytime. You can only cancel your Prime membership before the end of the trial period or after your first year of service if you don’t want to continue.
It depends on what type of subscription you have, but for most subscriptions, it’s as easy as logging in to your account and following the prompts.