False Advertizing in store and lack of customer service

Good Day.

I hope you are well.

I went to checkers on the 26 October to buy my monthly shopping, Im really upset and im going viral with my post due to the lack of communication from your branch in Carnival mall, I wanted to get my poppers and only after paying they advise me the are no stock of the poppers the cashier did not even advise me that she does not have stock before we contuined to make sure i want to continue , if they had no stock i wouldve go to other branch that had stock, I want to know what will checkers do to assist me in this matter as this not fair to us who are collecting the items for our kids, We wasted money at checkers, I need feedback urgently