Rude cashiers

I went to Checkers yesterday to buy a couple of things.I was so shocked the way the cashier treated us from we got there she was so rude because I didn’t have my extra savings card so i asked if we can open one for my husband she gave us attitude , so I told my husband to just leave it we will buy the items at it’s original price.We told her we forgot that we have a voucher for danone we want to use it she was furious calling the supervisor to make a refund and told the supervisor that we are just boring looking at us if she gave us grocery for free.Didn’t greet us on Arrival not even say thank you these cashiers are just plain rude no customer service at all I’ll do my shopping online than to get in contact with them