Treated Badly by cashier

I visit the new clicks in Rylands village at the very least twice a week , though the shop is convenient and most employees are nice , the one cashier Demi Fischer never asks for the club card , hence why I always ensure that I have it ready , however yesterday I was a bit occupied with my baby at the till and Demi rang up all items with out asking my cub Card , when I then told her to swipe the club card , with some bad attitude she told me if she has to swipe the card she has to ring up all the thing's again and stared at me with anger , I was so embarrassed by how she treated me I told her to leave the points, this is not the way I should be treated as a loyal customer , as though I am a beggar or worse. Very discouraging