Complain about customer service

Today I went to Debonairs pizza at Hillcrest Christian’s village, I ordered at 16:04 pm and I sat down to allow my order to be completed, as I was waiting there were people ordering after me, time kept going by and I noticed that people who ordered after me are receiving orders and I’m still waiting and the time now was 16:20 pm so I went to the desk, gave my slip to the staff member (a lady) and she took it with her and came back to me and said “it’s coming” so I stood there shocked and calmly asked another staff member (a lady) if they don’t use the queue system to ensure they help customers who came first? She ignored me the first time and continued to hand an order to another customer that came after me again, when she was done I asked same question again then she rep**** “it’s usually like that”, I told her that I ordered at 16:04 and everyone who came after me has been assisted and I’m running late can I please cancel the order and she took my slip, asked me what I ordered and I couldn’t remember specifically so I said “it was something meaty” and she was like “was it not chicken” and then she took another order that was already out for someone else and gave it to me like someone who was fed up, I could tell by her body language.. there was no apology, no accountability that they’ve done a mistake whatsoever and that is not how you treat a customer. I’m writing this review on my way home because I cannot even wait until I get home because that’s how disrespected I feel, what a horrible service!!