How to unban your site from google

How to unbanned your site from google Im running about 180 sites, and still counting, since google change their system, Im loosing my site pagerank, got deindex also the nightmare banned from google! dang its the worst thing, however for almost 5 month i fixed my sites that banned by google, and the result, 8 back to normal.. gosh, you really need to be patient with that and also, try alternative earning, mostly people will not advertise on the site that banned by google, but still you can try your luck, i never thrown away my site that banned by google, however i will see domain niche first, if its not worthed enough i will let it go after it expired. so this what i do in summary 1. i registered my site to google webmaster and request for reconsideration http://www.google.com/webmasters/tools/reconsideration. 2. with polite words i told them regarding the mistake that i've done, and i told them that i already clean it up, and showing them some of link that already againts their system. 2. for several my site, they refuse my reconsideration request however with polite words after i fixed my site and contact them again... ( be patient with the process they not just respond to your email, imagine that they got same request for a day probably thousand!) 3. be patient if your site still new site probably its easier to delete all your post and start a new one, with clean one without any link on it or with a proper articles related with your domain, but when you got 3 - 5 years site running and posted almost 100.000 post thats the problem! yeah my site 5 of them its running almost 5 years, and i took me couples of times to contact google for reconsideration.. i know this articles not answering to much for your problem, however i want you to stay positive about this