Buying Packs Doesnt Work For Me

So I introduced this game to my sister and we played on the multiplayer feature and that was great. However later on, we went to the games store because we wanted to buy a music pack, but it wouldnt let us on both my sisters and my iTunes account and an error showed up the three times we tried. A few days later, we check our banking account info and see that the game charged us both for the music pack (my sister twice and me once), however, it didnt show at all on my iPad. Basically, what Im saying is that the game overall is great, but the creators definitely need to fix the buying the packs issue.

keikowakeo about REFLEC BEAT +