Of course! Here’s a draft for a message you could display on your website if a payment fails or if a transaction is cancelled.

We’re sorry, it seems there was an issue processing your payment or the transaction was cancelled. If you encountered any difficulties during the checkout process, please don’t hesitate to reach out to our support team at [support email or contact number].

Alternatively, you can try again by returning to the checkout page. We appreciate your interest in our ebook, and we’re here to assist you with any questions or concerns you may have. Thank you for your understanding

Feel free to adjust the message to fit your brand’s tone and style!