Qdoba Mexican Eats review: staff

I arrived at the Qdoba Mexican grill in Milwaukee, WI (the address I 3101 N. Oakland Ave Milwaukee, WI 53202) on Saturday January 27th at approximately 10:57 p. m. I walked to the counter to preceded to order and I seen one of the staff just walk past me and go into the back area of the restaurant. I waited for some one to take my order, then the same staff I seen when I first arrive came to take my order. I preceded to tell her what I wanted. I had to keep repeating my order, because the staff was very rude to me and not listening to what I wanted. She seem as If she didn't want to be there. I then ask if I could speak with a manager, she stated that she was the manager. She was extremely nasty to me very unprofessional and bad for business. I was shocked I always come to this location and usual received very friendly and great service. I have never seen this women before, so I'm assuming she may have been new. I would not be going to that location EVER as long as she is there and I will as be bogging about my experience at this location. I tried calling to speak with a higher supervisor but I was told I would need to go online. I didn't get her name but she was a younger lady African American and she was working the late night shift at this location on Saturday January 27th around closing time. I have never been treated this way. I left there feeling awful. Can someone please look into this matter. Thank you