Providing that you have trouble with making a phone call or fax, you could also contact us through the Internet. Please send us an email directly to the address Mnpkzx@vip.163.com with your detailed info, and we will contact you at the earliest time and reply the request. (You will need to offer us the details of the product, including the date of production, batch number, specification, as well as your name, address and contact info. We will reply your request at the earliest time. )