games bought on an account can not be transferred to another account without proof of ownership
your best bet is contact ubi support over twitter or facebook and provide them with your support ticket number as well as any details on your two ubisoft accounts
you can reach them here
https://twitter.com/UbisoftSupport
https://www.facebook.com/UbisoftSupport
as they will not discuss account or game ownership issues on any open forum like this one