Spoiled food

Hi I bought 2Amasi on 30th September the expering date was 15 October this weekend opened one my kids where complaining that their stomach is running and when I open another bottle it's spoiled before it's expering date I want to send them back my problem is slip but I did swipe it's shows on bank statement on the 30th September will they allow me to send them back with no slip but shows on bank statement