Woolworths issue

I shop at the Woolworths Lonehill at least 2 times a week and have done for years. My issues is that when paying with my Woolworths card they demand to see the card. This is done completely at random. When I ask why the answer I'm given is it's protocol or I want to check if it is you who owns the card. Non sensical. The staffs attitude is tantamount treating me like some ********. I have raised this issue as a complaint on the website and to date absolutely no response.