I was shopping in Coles located in World Square. Prior to this, I had been to Aldi in North Sydney after a job trial. I had bought 3 cans of spaghetti of the brand "Corale", a brand exclusive to Aldi stores. Because Aldi don't supply bags and I didn't realize until i had already paid for my goods, I had my items in my hand bag. Before entering Coles World Square, I showed my items to a man at the check out and asked him for a plastic bag to place my 3 cans of spaghetti in with my receipt in fear of looking like I had stolen the goods. That was fine with him. Upon shopping, I noticed a security guard staring at me awkwardly a couple of times and got quite cranky about that as I was so careful prior to entering. I went through the register and payed for my goods, only to have this security guard that couldn't speak great English start yelling abuse at me that he saw me steal cans of spaghetti! I was there for a good half an hour trying to just get him to stop yelling and look at the receipts, as I had a receipt from Aldi and one from that moment listing everything I had on me. When I finally got him to look at the receipt, he demanded I find the date for him, which I did. This still wasn't good enough for him and he kept yelling and threatening to call the police. I eventually yelled back and told him to shut his mouth and go find a can of spaghetti of the brand "Corale" in the Coles store if a RECEIPT stating all the goods in my bag was not good enough, as "Corale" is a brand EXCLUSIVE to Aldi! Which he refused to do as he was so confident he had caught a thief! He kept yelling and I responded with "I will call the police myself for harassment if you do not do your job and look at these receipts properly! You didn't see me steal anything because i didn't, and I have the proof. I don't want either of us wasting the time of the police! And who do you think they will believe, your word or my physical proof!" I took each item out one at a time pointing to everything I had bought on my receipts [for the 4th or 5th time!] and asked him if he thought he may have made a mistake. Rudely he said, "Next time you report to me with your goods" which I may have done had I have noticed a security guard before I entered the store, instead I showed a Coles employee thinking this would suffice! Does this warrant me to be abused in public?! My brother is a security guard and he tells me I should certainly report him for harassment and this is what I am thinking of doing. I would like some kind of explanation, or information on the security company Coles employs as this incident may have ruined any chances I have of working for Coles or anywhere in world square after trying for a position so many times. Not a single Coles employee offered assistance. I can assure you if I was lucky enough to be employed with Coles I would be a model employee and could not stand by while I watched a customer telling a SECURITY GUARD to calm down and please read their receipt, claiming they didn't even stock the products the individual was being accused of. Especially while being hurled abuse by the guard ignoring proof.