Unable to activate Parallels Desktop 12

I am trying to upgrade my Parallels 9 to the newer Parallels 12 so I can upgrade to OS Sierra. After entering the product keys for my old version and the one I just purchase, I get this message. "The product key of a previous version of Parallels Desktop has been not accepted on the license server." How do I fix this?

Dale

 

Hello DaleS1, Parallels Desktop can be upgraded from version 10 or 11 http://kb.parallels.com/123866 otherwise you have to purchase the Parallels Desktop 12 Full version.

 

I purchased the upgrade for version 12 for $49 yesterday. Can I get credit for yesterdays purchase and apply it towards a full version or do I have to pay full price for the full version? I have attached the receipt for reference.

Thanks

 

We see that you have got the refund and bought the full version. Feel free to reach us for support.