While I was sleeping I received * emails: the *st at *h**am with a security code of * n...

While I was sleeping I received * emails: the *st at *h**am with a security code of * numbers in order to chande the Facebook password* the *nd one (at *h**am) saying someone logged into my account at *h**am in Leskovac with the IP ***.***.***.***. The *th email (at *h**am) saying that person logged in through Chrome to Windows *** The *th email (at *h**am) with another security code of * numbers* and the *th and last email received at *h**am, saying someone logged into my account at *h**am in Leskovac with the IP ***.***.***.***. The issue is that now, when I try to log in, it says "To keep your information secure, we've blocked your account. Before we can unlock it, you need to verify your identity and change your password.", which doesn't solve anything since the only two options available are through a message sent to my phone number (which is an old one that doesn't work anymore) or to confirm my identity on another computer which doesn't work either because if I try to click it says "login was not approved". There is any other to confirm my identity of to solve this issue? I don't want to lose my account but I am afraid someone is using it without permission.