Highly Dissapoint in PicknPay Online Shopping

I placed on order online yesterday, I added 2 additional items, to make up for the delivery costs. My account was debited for the full amount yesterday, only to receive the 2 additional items and not my main item, with no communication at all about my full order not being processed. I called and was told that the item could have been out of stock when the order was picked and packed, yet the item is still showing as available on the website. I checked again and now the item is nearly R100 more than the price listed yesterday, and I am able to add it to my cart. So why was the item not supp**** to myself and why was there no communication from PnP, at all, regarding my order, prior to delivery. This is pathetic service from such a giant retailer. Reference ***