Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_5 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8L1 Safari/6533.18.5)
You can try asking to iTunes support www.apple.com/support/itunes
If they're old purchases I'm not sure they will refund you, they usually refund recent purchases associated with good reasons.