EmblemHealth Call Service Representative interview questions

I applied to the position on Indeed and a few days later got an invitation to in a open-hiring event at their HQ on South St. I am not well off, I currently work a food service job and live paycheck to paycheck, so I have been looking for a higher paying job with consistent hours. That is to say, I do not have many business attire outfits, nor do I own dress-shoes. I put on my nicest outfit and went to the location to interview, I had my resume ready and spent hours researching the company. I walked into the lobby and the first person I talked to was very nice. She asked where I applied and told her I applied on both the Indeed and company website. I then got sent to speak to someone who immediately looked me up down, then said, "Oh it's company policy that we aren't allowed to speak to people in sneakers." I understand dress to impress but for a non-profit who "(Offers) quality coverage that everyone can afford," I would think they would at least look at my resume. At least speak to me, get to know me. And be understanding that I may not be able to afford dress shoes. I am really disappointed that I was unable to explain why I think I'm right fit for the job or any of my previous experiences. How are we to expect people to lift themselves up from paycheck to paycheck when companies won't even interview people unless they have dress shoes.