Staff members shouting at clients

I was disgusted at the service I received at your card renewals desk this evening. I went to renew my card as it expired. I was told they downgraded me to maroon. I was not impressed. I was downgraded from a gold card to silver about two weeks ago. now they want to downgrade me to a maroon. I was unhappy. The person helping me was rude and shouting at me. I am a customer and need to be treated with some form of respect. After getting a supervisor to assist which she did in a matter of seconds. She was shouting at me in front of the customer supervisor. I have withdrawn the monies on the card and I will cut it up and toss it. i will not spend a dead cent of my money in your establishment again. disgusting service from a shouting rude staff member.