Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Leaked on second day !

I purchased this for my daughter who is on a high school swim team. Day one everything worked great, half way through pratice on day two the case leaked and ruined her IPOD. I have called H2O customer service everyday and left a message but no one has ever returned my call. The recording says they are not able to take my call at this time. Could it be that everyone is having problems and perhaps they mass produced without testing? Poor design and now I get to purchase a new IPOD.