Call barring password

[sonyxperiaz3]

Hello, I want to block all calls, but when I go to the settinhs>call barring the options for blocking calls are not active I cannot touch them and the only 2 i can touch are deactivate all and change password the problem is that I don't know what the password is I haven't set one and I've tried with 1234 or 0000(I was told that it must be 4 digits only) and the puk code of my sim card( I dont have pin2 ). Does anyone know how to activate all options on the menu not only the last 2 or any way I can understand what the password is? It is really important for me to block all calls for 2-3hours. thanks in advance.