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Your websiteis not de-indexed from google , it simply fell down in SERP as you still show for your branded keywords..

https://www.google.com/#hl=en&safe=off&sclient=psy-ab&q=site:eseyo.com+%22seo+in+brentwood%22&oq=site:eseyo.com+%22seo+in+brentwood%22&aq=f&aqi=&aql=&gs_nf=1&gs_l=hp.3...18169.25075.1.25530.25.24.0.0.0.0.243.4049.1j17j6.24.0.GLBZBoFXI_c&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=160a46efcf63646c&biw=1454&bih=762

Did You recieve any sort of notice in Google Webmasters Tools ?

Regards ,

Yan Desjardins