Expired beverage and no response to query

I bought a Kingsley 2 litre drink. Upon drinking a hlass, I noticed that it had actually expired. I frlt billious. Not sure whether it was from the thought of the toxic drink. I sent message through their customer care fo on their website immediately. No answer till today. Unacceptable to firstly keep expired stock for so long (august already), secondly. Not responding to a complaint is just not right.