Lost Starred files and playlists

[BBHStony]

Hi,

I am a Premium subscriber and whilst visiting friends on Saturday we sync'd to their IPAD and logged onto our Account and played all night with no problem. Our friend the next morning found all his memory had been taken up by our Playlists and deleted all the files which we assumed would have only been local to his hard disk.

We have logged into our Account this morning and have lost all our Playlists and over 2200 of our starred songs.

Can anything be done to restore them please.........As you can imagine we have many many hours worth of music and time putting in here.

All help most appreciated.