I had the same issue with my website - bloggerlifeline.com and according to the facebook group i am apart of, i was told that...
1. I have to stop posting too frequently new posts from my blog
2. I have to stop posting manually i.e i should use a 3rd party post scheduler to handle the posting for me.
3. When i was blocked i chatted up support and told them a very emotionally story about how much i had lost traffic and also how much i will loose if my website url remain blocked, i think that's why i was unblocked within 12 days.