Cannot reset security questions

Hello this is my first topic ever here so sorry if its not in the right place, so here is my problem i sold my old Iphone with my apple ID 5s used it like 16 days , now i cant remove it from my device list because i cant remember my security questions i`ve been like 12 or 13 when i got my first Ipad and i registered with some random *** , i`ve been using it for 6-7 years already and i cant remember the security questions can tell everything u need about that account rly need help here , also it says that apple doesnt have enough information when i try to reset em trough the link? contact me if possible on +359883308250 or the email of my apple ID account.