Thanks for the replies. @Butcherbird59 I have looked everywhere on the FC4 start menu and it is not there as indeed it couldn't be since I cannot download it.
WID992007 I have two accounts for reasons which would take too long to explain; on one is FC3 and FC4. On the other, which I log into using my primary email address, is Assassin's Creed 4BF. When I ordered VOY it only gave me the option to use my primary email thus VOY is indicated on the ACBF page but it says I have already entered the activation code and there is no link to download VOY. On the FC4 menu if I click on "Buy VOY" the page freezes and I have to exit it.
I will probably have to call the lady at UBI Customer Support who I have had to call so often she probably thinks I am stalking her. I may just ask for a refund because I am truly getting sick of these problems trying to buy Ubisoft products digitally.