Long life milk not so long?

I have recently bought 2×6 packs of c***** 1litre long life milk with an expiry date 22 june 2018.

To my suprise every single box had gone bad. Water came out with no trace of milk followed by white thick gunk smelling horrible. I checked every box. And it was stored in a dry cool place.

I am so dissapointed as I always by c***** even if they are a bit more expensive just because of the wonderfull taste.

I would really like to know what C***** is going to do about this!! If it was one box of milk I would have let it slide but 12, seriously? This is unacceptable!!