Bad after sales service

We purchased a 6 pack EverFresh box milk to find ever box we opened had this white things inside, so I contacted the number on the back of the box and was told they will need to collect it and send it for testing. I got a call from Parmalat and was told it will be collected on Monday, on Tuesday I phoned back as it was not collected and was told it has to be escalated. I still did not get a call back from Parmalat and this two opened boxes of milk is in my fridge for over a week.