My league of legends account got locked

Hey guys , i hope u have a great day and having fun , today was A shocking day . My main account got locked for no specifique reason , i dont know whats happened exactly , yesterday i was playing normely with my friends trying to complete arcade missions , today i woke up , my friends told me to join them playing some games , i opened my client , trying to connect , i found a message said "This account has been locked due to suspicious or fraudulent activity "

i was completely in trouble , like i imagine my 2 years experience in this game is gone :( , it was my first account , and i never created another one before . After , i joined League Of Legends support site to recover my account , i answer too many questions , but i didnt really answer to some ones that ask me for old stuff , like "what is your first 5 champions " , is there any chance to get back my account ? i really feels bad ... my accounts reminds me too many things and moments ... i did never had a ban or toxic punishment before , i was a friendly teamte due 2 years . my honor level is high , everything was good . can you help me please? sorry for my bad english anyways , thanks for reading

Have a nice day :)