Disgusting liqui fruit

I have been having a problem with the 2L liqui fruit juices. Last week i had to throw one away that was half full because it had gone bad after 2 days of it being opened. Yesterday i opened the 2nd bottle, used one glass and today it is gone bad and its basically full. I had to now open a 3rd bottle which im hoping doesn't go bad as well. This is highly frustrating and a great waste of my money as liqui fruit is not cheap.i cannot get through to pioneer foods customer care and they do not reply to emails