Initial interview

[khayyall]

Hello ppl

I have an urgent inquiry

Ive recieved my EAD few days after long months of waiting and struggling , next day i went to apply for SSN but things didnt work out as i wished for the lady said that my EAD informations not on the system yet and she gave me a letter states that i need to wait 6-8 weeks for my SSN , SSA have to verify my informations with INS , i went back home disppointed more waiting time , ive been in the states 7 months now i tried through this time to add my name on utilities but these companies (gas,electric,phone) and even banks require a SSN to add your name. i also tried to get a DL i went to the DMV they asked for SSN although i have an internation DL and regular license issued in my home country. last night i found in the mail box a letter to appear for Initial interview , i am not prepared yet i have not got a SSN yet i could not add my name on the bills all i have as evidences are pictures of me and my wife through 3 yrs of marriage and car insurance no bills under both names . i have a list of things that i should bring with me to the Interview , some of these things make no sense since we already filled them out and been sent with our case , why would they ask about them again or that letter is a standard format letter usually they send it to all applicants?
my interview is next month and have no clue what to do !!! no SSN no time to get bills show that my name with my wife together!!!
any suggestions or ideas will be appreciated .

Special thanks to austriacus
the informations that you ever given me were so helpful.... may god bless you