Items short on delivery but they don't care

I placed an online order and when it arrived, one of the items was incorrect in quantity. They sent 1/3 of the said item. I called immediately and was told feedback would be provided within 48hrs. Didn't happen. Called again and was told I would hear back within 2hrs. Didn't happen. They do not care, if delivered and its incorrect its not their problem. No one in their right mind would pay R330 for 4 packets of wet wipes, but try explaining their own promo to them. Absolutely disgusting an unprofessional.