Store staff not assisting

Checkers Hyper Constantia Kloof Roodepoort. I left my trolly there without paying as I will not support them anymore! They advertise a Back Pack bag for R199 if you swipe your smart shopper card. When I got to the till - the price was R499 ... R300 more? I then ask the staff to check, they returned by saying; no it should be R499 cause I took it from the wring shelf. I then walked with the staff to the shelf, and found that they have removed all those bags from the shelf's and said that this is the last one? That is a lie - I insisted for them to assist with camera footage, but... they refused. Your smart Shopper experience are a problem in your stores as this wasn't the first time! But, I can ensure you to be the last time ever on card no: *** - because I will not use your stores anymore... I will go to PicknPay! The Manager on duty - an African Lady, just said "Sorry Ne'" You can cancel my smart shopper for what I care and go and check on it - the amount I swiped on previous purchases. You just lost a valued customers and sure some more - because I will not give you a good review to friends and family