Missing/removed mp3s from iMusic/iTunes purchased album

I purchased Genesis' live album 'Seconds Out' some years ago from iTunes. It used to have 12 songs in total. The album has been paid for...

Now I find 8 tracks have been removed/lost/stolen from this album on my iMusic.

I'm guessing it's a licensing issue, HOWEVER, the album has been PAID for and you can't just remove paid items without an explanation/refund.I am in Thailand with an Australian iTunes/iMusic account.

I've tried all the options reloading. checking if hidden... nothing shows.

Thanks

[Edited by Moderator]