If a lease is canceled by the owner or renter before it's accepted, your lease credit will be fully refunded. However, once a renter accepts the lease, the credit is used and non-refundable, even if you or the renter decide to cancel the lease. If you need to unlock more lease credits you can upgrade your plan here.
If you are a free member and you want access to eLeases you can compare premium plans to see which is a good fit for you.