Stopping the renewal is not cancelling

When you stop the renewal, the rental does not end at that moment. The paid month runs to its end, and the space stays yours until then. There is no refund for the current month.

After the current end date the rental simply does not renew again. Nothing further is required of you.

Either side can stop the renewal, the renter and the host alike. It is done from the rentals page.

Pressing stop a second time changes nothing, and does not move the date the first press settled.

If you want to finish earlier, that is a cancellation rather than stopping the renewal, and it is subject to the cancellation policy.