BioMark interview questions

I had an interview with the HR and then about 2 weeks later with the CEO. It took a month for them to get back on the next steps and follow up replies. The CEO made me do the presentation on the marketing strategies and within 3 working days, I submitted but there was no acknowledgment. I emailed the GR to follow uo but was told they are also interviewing other candidates. When I emailed the CEO to follow up as alot of research and hardwork was put in the presentation not to mention new ideas that they can just ripped off, the CEO replied saying they are busy and ask me to contact them again, next month!