No signage, customers must just know that things

So on Wednesday the the 19th of August 2026 I entered into your store at Bosman Square to purchase a few items. There were only 2 normal tills open at the time as well as the kiosk till, the lines were a little long and people were purchasing many items so I decided to stand by the kiosk. When it was my turn to pay, I place my items on the counter ( there were 9 items) the cashier there whose name is Phumudzo tells me that next time I should know that her till has a limit and only takes 5 items but the funny thing is that there was no signage or notice to this effect so I suppose somehow I was supposed to sniff this information out of thin air. Kindly put up the necessary signages and tell your staff to adjust their attitude, perhaps that's how they speak to their regular customers but I was just passing through Bosman and needed a few items hence the bad service has left me unsettled.