I got Farcry 4 about 3 years ago, and activated the game key on an account, sadly, about 3 months later my PC broke, and I was unable to fix or retrieve anything on it. 2 years later (now) I finally got a new PC and I want to get the game back, but I don't remember a single thing about my account that the game key is bound to...is there a way I can cancel the account and move the game to this new one? if so, I would love to know, as I love this game and want to replay it!!
you should always write down stuff like that in a little book for all online accounts ,do you remember the e mail address you used ?
if so contact Ubisoft Support
for Uplay Account Support you can try to contact them by Phone
you can find phone number\ support options \ and support hours information @ https://support.ubi.com/en-GB/Contact#en-gb
if you have an account problem call em on the Phone or use twitter or facebook
here are the twitter and facebook links
Facebook: https://www.facebook.com/UbisoftSupport
Twitter: https://twitter.com/ubisoftsupport