Address change F4 Visa category

I had submitted F4 visa application since 2006 for bring my sister and brother here in USA. they are living in bangladesh. recently i have changed my house and i dont know how can i change me home address for the visa application. could somebody tell me how can i change my home address? if uscis try to contact me i cannot recieved any letter in my old home. also if i have applied since 2006 then when will they call my sister and brother? its been already 6 years :(