Faulty fridge

I bought a brand new fridge through pick n pay home , i waited almost 2 weeks for the fridge once i got it , it seemed to be fine but shortly after my fridge was not cooling down at all , the freezer works but ive had to throw away almost R500 worth of food from my fridge, (cheese,ham,viennas,milk etc) ive tried to make contact with defy without any luck pick n pay informed me that i need to contact them directly but im not being responded to ,the fridge is still under warranty, its very upsetting because i need to put ice blocks in my fridge so that the stuff in there just keep cool a little bit. This is ridiculous i believe its an out-of box failure or fault and id appreciate it if this can be sorted out before i lose more money.