Stackby does not offer refunds on any plans or add-ons purchased (Powerups or Apps Marketplace), as per our terms of service.
We can however turn it into future credits you can use for any of the plans.
Note: Stackby gives 14-days free trial on our business plan as you sign up and have a free forever plan after your trial period ends for you to make a proper decision to purchase any of the plans or add-ons.