We're sorry to hear that your purchase requires a refund. Unfortunately, Selly is unable to provide assistance with refunds as all payments go directly to the seller and therefore Selly does not hold/escrow payments and all products are seller controlled, Selly is simply a e-commerce platform.
If the payment was made via PayPal or Stripe, you'll be able to create a dispute on their platforms. Before escalating the situation, we recommend you first contact the seller and attempt to come to a solution.