FALSE ADVERTISING AND LIES

I submitted an online order via PNP ASAP for 5x the same item that was on special for R100. My order went through and payment was made. Before my order was delivered I received an email stating that I had been refunded as the items were no longer available. When I called the Winklespruit Pick N Pay Store where the item was to be dispatched from, I was told that the item is sold out. After a few hours when I checked once again via the APP the item was available but now at R200. I queried this and where did the item become available from all of a sudden but at a HIGHER PRICE, To date I have not received a response. I submitted this query to PNP and got no response whatsoever except for a response to say that my query has been resolved. Please explain how it has been resolved because I did not receive any response at all. THIS ISNT THE FIRST TIME THAT THIS HAS TAKEN PLACE