Incredible Connection - False Advertising instore

I walked into Incredible Connection Mall@Reds on Saturday, looking for a cellphone. On the display there was a Huawei P20 Lite information and pricing. I asked if they had it in stock. The sales assistant came back and said the phone on display is the last one, but I can get it at 5% discount. I asked them to get it ready for me, with the box and everything. I will be back in a few minutes to pay. When I got back, they said to me, that it is a Huawei P10 Lite and that the printed advert is incorrect. They claim it should've said P10 lite. The price was R5899 which is the price for a P20 lite and certainly not a P10 lite. I couldn't get any answers from them as to why they advertise P20 Lite and they don't stock it. It is false advertising instore. No excuse or we are sorry nothing. The sales people couldn't care less.