20+ Decathlon Exchange Refund Gif. 1) write to us at contact.ghana@decathlon.com with your order number. We will refunded to your bank account or credit card in 15 days after we received your request and our team will contact you back to confirm the information or you can in the case of decathlon fault, we will take care of the delivery fees to bring your packages back.in the case, you desire to refund (not.