While your home country is under-represented in b-schools, that will probably not help you significantly in your application. You need to instead explain what makes you specifically more different from the thousands of other accounting/audit applicants.
The multi-national experience will help. Definitely work on getting a higher GMAT -- you will need it at a top 10 school. I detected a couple of language issues in your post, so perhaps working on the verbal section might have the most area for improvement. (And people would expect a high quantitative from an accountant.)
I'll send you a PM with another question.