Can you contact the seller and get the Registration card(s) from him/her? He/she will also need to Transfer the Licence(s) to you.
Other than that,
check the FAQs, via here. If they do not resolve the issue, there is a link at the top of the Search FAQs page to the Technical Support form, for some one to one investigation and help. Response time is usually within 2 working days (US (East Coast) Business hours, generally), but in the current circumstances please allow some more time.