Unprofessional store cashier and merchandiser

I bought a Schweppes Dry Lemon at Pick n Pay Express in Malibu Motors at Malibu Village, Cape Town only to find that all the cans were chipped and bugged up. So I ask the cashier why are they selling us such stuff and I was told by both the cashier and merchandiser that if I didn't wanna buy it I should leave it.

I mean what kind of service is that when you raise a concern and you get told if you're not happy then don't buy it.