bad service/customer experience. .still angry

I walked at 16:55 as decal clearly state that the shop closes at 18:00 on Saturdays. ..I shop for my goods that I needed....at 17:00 Precious (very rude and has bad attitude) walks up to me saying that I must hurry as they are cashing up..and politely I asked her where do I feature cos the shop closes at 6 as per the decal..she then walked away with a bad attitude showing on her body language..Then few minutes later Khanyi and Shirley started [URL Removed] and pay we are cashing up...trying to ignore...I continue shopping cos I am already in the store and remember the closing time on the decal is 18:00...as I continue the security guard who seems to have forgotten his job description and duty list comes towards me and vigorously claps his hands in attempt to get my attention...and then I lost it. ...getting to the cashier Shirley...who didn't bother greeting me who was still worried about cashing up scans the things and I ask her what time does the shop close...and she responds with a bad attitude that they close at 5...and I still said the time on the decal is 18:00 not 17:00 and carried on saying Saturday they close at 17:00 I then asked for the manager and voice my frustratio