Spar TOPS's Manager Appalling behaviour

I went to buy 440ml Hansa at Top Northcliff. The price tag in the fridge at the top of the 440ml Hansa stated that 12 is R135 but I was changed per 6 pack which 12 came to R162. When I queried this with the cashier, with an attitude, she told me that the price I saw in the fridge is for 12 in a BUNDLE and not separate two 6 packs. I responded by requesting to be offered that bundle she is referring to instead of being charged 6 pack separately. She sent the door security guy to go and fetch it for me. The security guy came back with the same separate 2 six packs and he said the 12 bundle has been discontinued. How he got this information from really became a mystery to me as he went alone to the fridge. The issue became worse when the cashier called in the manager who was at the wine section (on the left hand side when you enter the bottlestore). The manager (who happened to be white) with an attitude as well calling me "my friend", he shouted that 12 bundle has been discontinued and are not made any longer. I questioned him that if he knows about this why he kept on the 12 pack sign of R135. Is this not misleading customers because I was also misled by his price tag on top of the Hansa in the fridge. He thew his right hand at me and said he will remove it. There were other white customers behind me when this behavior is thrown at me. I felt so humiliate and being belittled by this manager in front of the people of his colour. This was a really show off and unbecoming behaviour that I will appreciate that Spar do something about it. I will also be taking this issue to social media including Hellopeter in order for this kind of treatment and behavior to stop when the store is at fault. Also I would like the manager and the cashier to tender their apology for their rude, unbecoming behaviour. After all, we are all customers and pay with same money. By the way, your website also states customer care number as *** after a 5 minutes hold on a call, the consultant who introduced herself as Corina, told me that this number is for Reward programmes only and not for complaints. She gave me this number to dial *** which took me to voicemail to leave message after the tone. What customer care are you offering with this wrong information???? This is appalling service from Spar. You cannot be reached when you are needed.