LOL. Just LOL. I have no problem with संगीत tastes but wow alot of people don't buy संगीत and आप still do? xDD
Whatever nice job supporting the artists. If आप wanna buy it. I would suggest downloading it first and if आप wanna support the artists then buy it. या else you'd have this problem like you're having now. This is the reason why I do not use iTunes.
Read this: It even says here आप should backup your iTunes संगीत because somehow they get erased.
When I bought this new Vocaloid album on iTunes, one of the songs got erased but to get it back, I just held the power button and slided to power off and when I turned it back on it was there. If that doesn't work, I guess आप could just try to use iCloud, like if आप backed it up? I usually back my iTunes पुस्तकालय up with my iPhone and iMac so if I lose anything, I just connect it with my computer and I get it back. Um, well, I guess if its not in your purchased सूची either, try searching the song up again and see whether आप ahve to buy it again या आप can just tap download again. :I I'm not sure, try contacting Apple. Here's the link to the सूची of ways आप can contact Apple: