lowing me to return xfinty equipment

I arrived at the xfinty store located at 842 catonville in baltimore maryland  upon enter i was addres but I didn't know at the time because I was on the phone with a xfinity representative once I finished my conversation the employee who addressed  me as I walk in addressed me again by saying  mam you have one customer in front of you I replied okay and I continued standing where I stood when I first arrived after the customer's who where being assited where done the other person who I assumed was next walked to the counter and the young lady began service  fo them now  I'm just waiting after about 2mins into the customer ahead of me being served the xfinty employee who addressed me says mam do you have equipment I replied yes I'm returning it the employee the responded give it to me and I replied I would like a receipt and the employee replied you'll get  and I replied how your sitting there having a conversation with someone I'll continue to wait then the employee stated I addressed you when you came in and I replied I didn't hear you when I walked in because I had my ear buds in and I was on the  phone with a xfinty after I said that the employee response was you can leave and my response was why you said I have one person ahead of me I'm just gonna wait my turn the the employee told the other worker who was doing the work not to service me and then I left the store .(I've been a loyal xfinty customer since 1991 and I have never been treat so unfairly the way I was treated today .