Expired and bad attitude from the Manager Shoni

I bought a drinking yoghurt at this store and when I got to the office as I was drinking a realised that the taste is funny and sour when I checked I realised the expiry has pas long time ago. In 18 December 2014. I immediately went back to the store I asked the cashier to call the manager and she directed me to her ( Shoni) I told her about the incident and actually laughed atas she was talking to her colleagues. Then she rep**** with a very stinking attitude and said \ go get another one". As walk to go get another one they repeated laughing. I'm very unhappy about the service I received especially from a manager. She didn't even bother to apologize. Shoni attitude is very bad! I'm hoping that the yoghurt won't cause any health damages as I was vomiting. Because I will hold the company responsible.<br> """