Please refer:
https://helpx.adobe.com/x-productkb/global/find-serial-number.html
This would help you in confirming your Serial. If it still does not solve your issue then contact Activation Support:
http://helpx.adobe.com/x-productkb/policy-pricing/activation-deactivat ion-products.html
Click the Chat Now button at the end of the page and talk with a live agent who would resolve it ASAP.
Regards,
Ashutosh
