Ann Taylor locations in Houston, TX

I got $20 Reward because I am a Credit card holder with Ann Taylor, and decided to buy something at Ann Taylor. at Check out counter the associate asked me not to use and discouraged me by saying that if she scans the rewards once and it does not go through I will loose the reward and there is nothing she can do about it.
I wanted to use my Reward dollars. I don't know how she scanned it, she said it is already used when I told her that I never used it before she called some where and kept telling me that this is night mare, this is horrible and ended up saying that I cannot use the Reward dollars, the reason could be that I have unpaid dues on my credit card, which I don't have I pay all my dues on time. It was a really bad experience for me at the store.
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