Empty dumpies

<p>Hi there , I'm a big castle lite fan and I've been drinking it for a few years. I recently bought 2 x 18 packs. I stored it sealed in my fridge . after a few days I opened the last pack and realized that there is a dumpie (340ml) 90% empty , so I checked to see mabey it leaked, but everything was still sealed. so I just said okay nevermind its only one , I went threw the rest and I found more , in total I found 3,that was so to say empty. I dont know who to contact but since then I hardly buy Castle lite , if someone can please contact me.</p>