Safeway review: rude employees and as well the manager

I was purchasing some sodas select brands and I use the coupons in the add and she those weren't the coupons. So another employee past by was laughing and been sarcastic and said those are not the ones and so I can't purchase the items w that and he said you can purchase anything you want but still laughing and been sarcastic and than I addressed the manager in the store a lady and I told her and she was very rude as well by saying let me explain to you but in a loud angry voice. I feel really bad.