You need to sit there, even if they are not willing to arrange a short one/two minute meeting.

While sitting there, you would come in the notice of some of the managers while they pass by or via CCTV. And you have then the opportunity to meet them seeking for their guidance for a way forward.

Most of the companies receive the CVS in dozens every day, which they just file off, because they do not have so many people to read each and every CV, analyze and do the sorting and then contacting.

Walk-in interviews are the most potential method of finding a job. This is highly in practice in the USA, where the companies just post their vacancies at their reception and do the interview there and then.

Walk in Interview can be at their request or on your request, both ways, it works, just try.