Deleting everything is not the solution.
First thing first, you need to know why google has sandbox your site's
So try to find out what you have done in the last days before the hit
This is crucial and if you are a good IM then you have make some note's what you did.
Next thing is to get back in goolge as fast as possible.
What I do in this stage, I pick one post and redo all the keyword research for that post/page.
If there is a major drop in that KW's total monthly searches I will drop that KW else I'm going to check if the content I use is unique enough.
The best site to check this is in my opinion is copyscape.
If the content you use is not unique enough you need to rewrite that content.
Now I read that all 10 site's are amazon stores on wordpress with some automatic plug-in's.
This mean that none of those post have unique content.
So try to rewrite the description of your product in your own words, this will help you a lot.
At last try to increase the total amount of back-links.
You need them to grow, google likes website's with lot's of high back-links.
Good luck with the rest of journey
