Samsung sending PTA appliance & Tv and not helping

good day? please assist us on the 23-10-2015 we reported to Samsung that our refrigerator is not working and they send the job card to Pretoria Appliance & TV and they came after 4 days by that time we already lost groceries worth more than R2500, when the technician arrive he was having uncovered computer box and he fix our refrigerator, to my surprise on 26 November 2015 our refrigerator went off again and we reported it and the job card was issued to Pretoria Appliance & TV but they are not fully functional and they came but they said they don't have computer box we must wait until they order it they don't know when, when I ask them about the our grocery they said cant do anything. please help us we cant afford to loose another grocery worth more than R2000 please assist us. Pretoria Appliance & TV not willing to help and Samsung keep on sending them to us