First thing you can do is appeal to Facebook 

Second thing you can do is to contact Facebook Support

•  www.facebook.com/help or https://www.facebook.com/business/help

• Click on “Support”

• Chat with a representative to get your ad account back

Third thing you can do is to buy an old fb account from www.fbaccs.com

• Make sure you don’t change anything like the email, password etc. in the first 2 weeks. 

• Warm up the account before using it: https://fbaccs.com/warming/