Anti theft siren

Hai,

Please help me , I'm in deep trouble . I have installed avast anti virus in samsung galaxy chat phone.  When I shifted to Mumbai I bought a local sim card. I replaced the old sim with new one . suddenly anti theft alarm went on . I lost my presence of mind and did something foolish. send recovery sms. 

Now I am not able to use even with old sim. I dont remember avast pin.

I lost access to all contacts. Please help me

Android forum section is here. http://forum.avast.com/index.php?board=37.0