Can foreigners find studio apartments in Gangnam?

Hello! I'm a foreigner who has been living in Korea for about 6 months now. I'm currently trying to find a studio apartment in Gangnam, but it's been really tough because every time I visit a real estate agency, I get rejected just for being a foreigner. The security deposit is also way too expensive. Has anyone had a similar experience? Is there a way for foreigners to get a lump-sum deposit loan? I've tried using the Zigbang app and visited about 5 different real estate agencies, but they all say it's difficult once they see my foreigner registration card. If anyone can recommend a good real estate agency or app, I would really appreciate it! And if you could share your experiences, I would be even more grateful!