Bad customer service-from Store Manager

I went to dischem wonderpark today while I was on lunch to find out the price differ from the one on the shelf so I did explain to the cashier and we went to the floor with the cashier to verify the price she saw the price which it R22,99 stated kotex 18 but cashier told me it's not for the price you see here and I said it doesn't state 18 she said yes but it was for so the was another price which was hidden with promotion shelf talker when she lift it also says R22.99 she said to me it seems this doesn't have a price the price at the tills it's the correct one I Said to her as a customer when I entered your store I should see the price but all the row here it's kotex I have packet of 18 it stated 18 customer who don't understand retail she also see R22,99 price so we went to the front and I waited there cashier came back and at the back of my mind I thought cashier will come with their supervisor so I asked cashier where is the person who should override I am on lunch I am getting late So after few minutes there comes front end supervisor after store manager who was 3 miles away from started to raise his voice and saying I won't come flying I come from the back receiving DC he just greet me and says to me I hear that you are looking for me .My respond I say no I didn't call any manager because I know that front end supervisor will sort it and if it's difficult for her will call their admin manager it will go step by step and he answered me saying don't lecture me .I responded to him that what you did when you come to the tills as a leader it's wrong shouting saying I should fly he answered that I can repeat that I won't come flying .I felt humiliated as a customer he do that in front of the cashiers as a leader of the store you need to lead by an example respect every customer that entered the store it doesn't matter customer is rich or poor.And it doesn't matter that the customer is working at the mall you need to treat the customer with respect. If you are a Store Manager disrespecting customers in front of your staff it's bad customer service.Approach customer with a good manner and listen to understand no need to embarrassed a customer shouting and tell the customer that I am still repeating that should I fly when they call me to the front I am so humiliated by Store manager of dischem wonderpark I always shop there since the open the store I was shopping at dischem today I even first time seeing the store manager who doesn't build his team to respect customers it shows even cashier can talk to customers the way they want