Hi Xinjian, thank you for reaching out. We're here to help. Could you please tell us more about the situation? Get in touch at 1-800-SAMSUNG or via live chat on our website (http://www.samsung.com/ca/support/) 

Hi Cobra, We want to assist you with your Samsung home appliances and help you love them. We recognize the importance of them in your daily lives. To better understand what your experiences are and help you as best as we can, please reach us with the following options: 1. Facebook Messenger: http://m.me/samsungsupport 2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513 3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us When you message us, please provide us with this reference number 1146047733 to help our team pull up your information. Leo