Creamline milk that is off.

This was my very first time trying creamline full cream milk. I brought a six pack and out of the 6 one full 1litre was off and not drinkable. I've send them an email explaining this and also that I do not have the slip anymore. A lady phoned me and asked at witch store I brought it from and I told her , she then told me someone wil be in contact with me to sort this out . Sadly no one has contacted me yet .