Bought in the app: payments go through Apple, which decides on refunds. Request one at reportaproblem.apple.com.
Bought on copeel.com: write to us with your account’s e-mail address.
Withdrawal, for a purchase on copeel.com: you may withdraw within 14 days of subscribing, without giving a reason, by writing to contact@copeel.com from your account’s e-mail address. During the free trial you owe nothing; after a payment, we refund it minus an amount in proportion to the service provided until you told us. See our terms.