Digital purchases are generally final once delivery or access has occurred, subject to applicable consumer law. This does not limit statutory rights, including remedies for defective, corrupt or misdescribed files. To report an inaccessible or incorrect file, contact tbbssupport@gmail.com within 7 days of purchase with your order details. We aim to reply within 2 business days. Download access lasts 30 days and we will resend links on request.