I lost my instagram account twice. No explanation. Just they were closed for 'security issues' - I sent over 10 emails with personal pictures asking FB to rever

I lost my instagram account twice. No explanation. Just they were closed for 'security issues' - I sent over 10 emails with personal pictures asking FB to revert that decisions. Nothing, not even a reply. Seriously, I am out. I didn't even bother to open a new one.