Assassin's Creed IV Black Flag Collector's Editions set sail straight into your living room

[Noodles]

After hearing all the problems many people have had with their Uplay items/packages, I've decided I want to cancel my orders with them (AC Black Chest and Watch Dogs Dedsec). Only I can't find how I actually go about doing this as I see no "cancel" option anywhere, so what's the best/quickest (and cheapest... bearing in mind I don't have a landline phone) way to do this? I hear their customer service is pretty bad too.