Poor Cashier attitude and bad service

Double-standard. Woolies Norwood Mall. Stop your ridiculous racial **************. I had my quick shopping for grocery and headed to the express cashiers (10 items of less). The cashier lady on the left had served an African lady with a trolley full of items (20+). I don't care as I know lots of people do clumsy thinks and don't pay attention to the regulations and signs. Now it was my turn and started emptying my basket. I did realise that I had an extra slap of 100g chocolate that I didn't count, so I had 11 items (instead of 10). I did apologies for the lady that I did miscalculate my item, and since the Q wasn't long (only one person behind me for X3 running express chasiersd), she refused to add any extra items more than 10? I did explain to her that it was my fault and even had the lady behind me agreed that it's OK, but the cashier kept giving attitude and refused to scan more than 10? When I asked her then how comes the African lady before me had more than 20 items and she served her with pleasure, she ignited than and kept saying: "Sir, we only do 10 at these cashiers". I had to remove the extra item and paid with grief and left this ****** Woolie. Absolutely disgusting. I know approaching managers will be a waste and I am not expecting Woolies to respond as usual, but you guys are getting worse and worse these days. A few months ago your cashier placed my olive oil bottles in your plastic bag which was broken and as I am approaching my cash the two bottles crash. I contacted Woolies but no response. Seriously, I used to love this place since I am Wooling from 2009 but now this is beyond tolerance.