Computer stolen, no norton serial #

My computer was stolen.  I purchased a new one, and desperately needing to use it I accepted the 60 day trial, but my subscription still had about 75 days left. 

 

Went to myNortonaccount.com and I recognize my order for the subscription, but cannot locate the serial number.  How can I get my subscription extended by the 60 days?

 

Thanks.