need help about my Suspension

Hey there, please allow me to introduce about my case. I have been AFK for years in LOL, recently came back in May and start playing, made quite a lot of purchases in just month. And several days ago, my account is SUSPENDED. After I set up a ticket asking why? Riot said that because they notified a abnormal activity in my account ( what abnormal? just because I came back to play after AFK). So they asked me to said some info when I created my account, which date back years ago when I wasn't even 18, so at that time I just wrote date of birth and other thing in random just to look old (admit it, some of you did it). So I responded that I cannot recall details when I set up this account? But I am certainly able to provide EXTENSIVE details about my activity this month. What they said, however, is that because of security reason, i cannot get the account back. And I must recall memory years ago to retrieve my account, or it is gonna suspended forever. So I wonder if providing recent info can help me :( [zombie-nunu-tears]