Hello @ShuangshanLi
Thanks for reaching out here; we’re sorry to hear that you’re still waiting for that return authorization. We do strive to get back in touch with the customer, with those return instructions, within 48 hours of submission of the return request form. It’s disappointing to know that this has been your experience. I do believe that is a current email backlog that our Customer Care team is hard at work to clear and resolve. If you’re still waiting for this to get resolved, I would encourage you to get in touch via our WhatsApp channel and one of our team will be happy to discuss the next steps. To do this, simply click on our Guides and manuals link, navigate to the ‘Contact us’ section of the page and select ‘Start a WhatsApp conversation’.
If you'd prefer, you're welcome to call the Dyson Helpline to speak with our experts directly. You can find their number in the ‘Contact us’ section of the page. We so also offer live chat on our website as well; you may access that by clicking on the purple chat bubble in the lower right-hand corner of the website.
Best wishes,