I'm sorry but all the payments are set up automatically with Shopify.
What we can do is give you a refund if you want to try the app longer.
To get a refund you have to first email shopify to ask for the refund.
Send them an email with the link below.
Next they will send us an email and we will approve the refund.
You can also use our app for free as long as you are on a test account.