[Name, Company Name & Address here]
As per our discussion on [date], regarding our order for [product name], [order no.], we are returning the shipment to you for a refund.
We are returning these goods because – [state reasons here]
According to our records, we paid you $[payment for order] for this order. You can deposit the refund amount into our bank account after deducting the return charges as per your order cancellation policy.
Thank you for your fast attention.
[Your name & Designation]
Encl: [Enclosures List here]