What am I doing wrong?

I have aggressively been applying for digital marketing remote roles for the last couple of months. At least three jobs a day - excluding weekends. I've only managed to get a couple of responses, but have not been able to lock down and work.

I've got more than 5 years of experience and the necessary certification - Google and Hubspot - and a couple of others. Areas of expertise are content and paid media marketing, plus that is what I love doing. But I am Kenyan and live in Africa. Could that be the problem? We've got perfect internet and I'm flexible to work at any time.

Please someone let me know what I'm doing wrong! Or rather what I need to do to position myself more favorably.