My Rift S serial number is not recognized by the support website

This is a user only forum, there are no Meta employees or support agents here, however, here is a link to talk to a human Meta Support person directly who should be able to help you.. Tıp :Try the WhatsApp link first! Usually the quickest. Good luck! 

https://www.meta.com/en-gb/help/support/?g1=5960237440706837&g2=26500769372871399&g3=none&et=none&sg=skip

Thank you very much for your help. I'll contact Meta Support using the WhatsApp link and see if they can investigate the issue.