Esso Station in Cheras Counnaught ., expired food & still can be RUDE!!

2 months ago i go to the same station. Bought the same item. Eaten it. Found out its expired. Return to the shop. Took few packet of it and went to the cashier. The cashier (a malay girl) attent to me and went to check out the other stock on their shelf. Just say "Sorry" to me. Okie. Fine. Last nite, 11pm 08/07/2007, I went back to the same place. Intent to buy the same item. Check out the expire date. And i was like, WTF!! Its the same 2 months ago stock and they are still selling it on the shelf!!!!!!!! Ok. Fine! I took it and went to the cashier. The cashier (a malay guy) attend me. I told him politely, This few packet already expired. He rudely stare at me and said " SANA BANYAK LAGI, ANGKAT LAH YANG LAIN PUNYA! " .... the other cashier (a malay girl) who is standing beside him look over and say "YA PILIH LAH YANG LAIN PUNYA!" ............and both of them LAUGHING at the counter. I was like WHAT THE FCUK!!! The first thing they should do is atleast say "SORRY" or go and check it to clarified the thing. Its like normal and they purposely sells the expired product to those who are not aware of the expired date!!!!!!I took photos of the place and both of the cashier are lucky to be covered up by the customer. The malay guy cashier still loudly scold when I took photos of them. If anyone who can or have power to bring this case to court or some agency that can take proper action on this matter, please contact me ASAP. My contact number is 016-6960886. Kevin.Those who are nearby, please go and check out the same product and see if they are still selling the same stuff or not.