Clover review: vanilla custard gone bad before expiry date

I purchased 1 box clover vanilla custard on Sunday 16.02.2020 to be used the same day with some dessert with some friends. The box was opened and used, only to find that taste was not right, and on closer examination, we noticed that the pouring spout was black from the inside.
We also were then complaining after about 2 hours after consuming it of runny stomach. I sent my partner to get some medication from the pharmacy to aid my runny stomach.
BB 21 JUN 20 PEO7 ZA5/88
PD 21 DEC 19 MT3D V3 23:08:41
Barcode [protected]