Rude staff member

I was at clicks in Norwood mall to go exchange a maybelline concealer which was not opened at all and I happen to not have a receipt, I got to clicks and there was no security by the door I went ahead and took more products I wanted to buy and went to the till as soon as I mentioned I wanted to exchange the concealer and pay for the new products I got attacked by one of the tellers Mxolisi he said “you are not supposed to enter the store without a receipt you should wait at the door for the security to come and assist you (so I must wait for a security I don’t know when they’l be back from where they are?) I explained to him there was no security at the door hence I just walked in. He says I wasn’t supposed to walk in. On top of that he refused to exchange the product I had, he said I need to exchange it where I bought it. I’m so disappointed by how he spoke to me in the first place I feel if he had spoke to me nicely I would’ve understood but he was cheeky and dismissive. So disappointed by his service