After six months I tried to tell them that I waited enough, and that they should actually deliver the item. They told me they cannot offer me the item, because it's not available. I told them it's actually available on their own store, at double the price. They told me that's different sellers, so even though they're selling it on their website, it's not actually their website or something. They graciously offered that I could cancel so that I could order it from them again at double price.

I tried to explain to them that I we've made a sales contract, and that it seems they want to unilaterally cancel it by simply not doing anything about it. I also tried to explain to them the issues of bait-and-switch sellling, and even cited from the government website (I'm in Canada, consumer protection is slightly stronger in the states). (Note that six months after boxing day, I can't get boxing day specials from competitors anymore)

In the end I spoke to several people who went around in circles over and over. Eventually somebody offered to give me store-credit that would cover the difference when cancelling the order and making it again immediately.

...I don't get why everybody thinks Amazon has great customer service. They don't even seem to believe in following basic consumer protection laws.