Rotten Steri Stumpi flavoured milk

I usually buy a six-pack of Steri Stumpi LITE weekly. Not anymore. I have lost count of the number of times that the milk is off despite the Best Before date being two months in the future. The chocolate flavoured LITE Steri Stumpi seems to be particularly prone to being vrot. To be safe, I emptied 12 bottles down the drain this weekend. Can't be bothered to schlep back to the store. I'll switch to C*****.