I feel your pain. I really do. I have never been taken to court but I have always owed money. I have Citibank credit card too. I have still been paying my credit card bill even though I am unemployed right now. ( I am paying it from my savings though). I owe alot more than you do (and I am not saying how much!) so don't feel so bad.
It is a good idea not to try to miss a credit card payment if you can help it. I know it sucks when you are short on money but in essence, credit cards are sort of 'borrowed' money. You didn't have the money to pay for whatever at the time so you put it on credit - which is borrowed time in a way. The finance charges are scandelous - I hate looking at mine every month *ouch!*.
Don't worry about it so much. Were you getting unemployment when you didn't work? I know Citibank has a thingy were you can have your payments put on hold when you are unemployed so you don't have to make a payment and don't get any more finance charges - but you can't use the card. Unfortunatley, I think you have to pay monthly for it before you become unemployed- in case, it happens. I never got that for myself because I need to keep my card open and useable for emergencies like car repairs. I remember it being really expensive too. You might mention and explain your unemployment when you are at court - of course, if you didn't contact Citibank for help, it might not matter. Still bring it up.
Remember that lots of people miss on their credit card payments - you are not the first one it has happened too. I am sure you will just end up with a payment plan of some sort but it will probably make your credit look bad for a while and I am sure Citibank will not raise your credit line for a long while. Are they cancelling your card? Can you borrow the money to pay it off from someone?
That is what I did - my uncle offered me the money to pay off my cards and a student loan and I am paying him back monthly without interest and no max/min payments (although, I try to pay as much as I can since I really want to get rid of the debt)- I pay what I can afford.
I have come to terms with the fact that I am just bad with my money and will probably always owe something. I am at least getting better at it.
Good luck and let us know what happens!