Rejection can be for several reason, for my case they disapproved my account because my site was not having proper navigation and not upto the adsence standard. I read their webmaster guideline, changed my theme, write 6-7 lengthy but informative article and waited for few weeks. After that i applied with same blog and they approved it in a day :fly:.
So my suggestion will be don't re apply again and again, instead read the reason why they have disapproved your account and work on those issue then only apply. Your account will be approved