I am self funded and dont need funding from them! In the four years i have been working some of the time but not in my field. Schools that want 2:2 want relevant work experience.

I graduated bout 4 years ago with a 2:2 BSc degree in Chemical /polymer Engrg from a Nigerian University. I have tried applying for an MSc and have currently received 3 rejections. Is ther something im doing wrong? I have no work experience and i think this counts against me. I'd appreciate ideas, advice from anyone. Thank you