Bad head office reply time

I bought C***** Nolac Lactose free milk In April, and when I opened the one bottle the milk was off, now I bought a 1L 6 pack, as I opened the second bottle it was also off, so now was not sure what to do as we live off milk, I then took images and emailed the customer service complaints department on the 24 May, called to verify the email address and did a follow up on the 25th May. was told to email again, did that on the 25th May and 24 hours later still no reply. I am disgusted with this as now I was inconvenienced and had to but individual bottles of milk as I don't want to open the remaining from the box as I dont know if it might also be off. The service is bad, not even 1 email acknowledgement from theis company. I will have to look for an alternative lactose free milk product as I am never going back to C***** again.