Hi there, you can always reapply for the YouTube Partner Program again in 30 days. Here's more info about this and what to do if it was an error: https://goo.gl/cNar2n . Hope this clarifies.
@TeamYouTube If I delete 70% of my uploads, will it be seen as a suspicious activity by YouTube? May I be terminated for have deleted lot of videos from my channel? I wanted to clean my channel before reapplying for the monetization