Complain from identity sebokeng unit 10 service

I checked for an item online so the size is out of stock but when I check in store it's shows thabong sebokeng unit 10 that size 40 is available. So seens I'm around identity Evaton mall I went there early in the morning for them to confirm if it is indeed and they checked and the lady who was assisting me said there's three of size 40 I went there tjo what an attitude from two ladies at the till point. And I'm only the customer in the shop Yoh instead of checking the items they just said it doesn't exits or maybe it's in the boxes at the back and they continue talking to each other and i just walk out sad I even feel like destroying this account card if this is the services that as a customer I will receive hai I will rather try next door poorest service : item unit number *** denim white short for R250.00