Bad service

The cashiers are rude at Usage in Welcome. Today I bought a roll on and i wanted to cashback. She told me she doesn't have cash and I asked if I can go and pay at money market and do the withdrawal there. She just took the next customer and was still waiting. When I asked her why is she not responding if I can go pay at money market or not. She just gave me funny look with no response. I was fuming now and asked her if I was was wrong to ask if i can go pay at the money market, guess what she told me that i must leave her alone. Its not the fist time getting bad service there. Please something must be done.