Front Desk Cashier - No customer service

Stopped At KFC round 11:30pm last evening 18 Sept '15 after a long day's work (14 and a half hours) to get some food, walked into the store had to wait awhile for service, (not a problem) The cashier on the front desk turned her attention to me, and I proceeded to give her my order, when the last customer comes rushing in and claims his order is not complete, without any apologies from the cashier gave her attention to him and this took awhile. Finally back to me, I continued to place order which was 2 streetwise 2's and I requested no wings - the cashier then without a blink of an eye say to me with attitude, don't give her stories of no wings at this time of night. I insisted that I don't want wings (3 times) still with an attitude she turned round and placed my order, turned back to me and just stood there, then she tells me (I am waiting for the money) I pay but do not receive a slip when I ask she has the worse attitude saying there is no slip. With her attitude and LACK of customer service, I believe she should not be working with customers at ALL!!!