Crystal Valley maas from Shoprite Jan Smart Kempton park

I normally buy Crystal valley maas Last 5 months I bought 3 x 2 lts maas at Shoprite Kempton Park Jan Smart, those 2 litres they became big and bust in the fridge before the expire date even before it's open. I bought 3 of them in different dates If they don't do that they become sour I've been buying these product before and it was fine, now it's a mess