Broke a lease, creditor doesn't understand that I have no job, I cursed her out...I'm stressed and annoyed!?

November of 2007 my husband and I moved out of our apartment. We had asked the apartment to fix several things, they never did. We decided to move out and went to the office and told them we intended to move out if things were not fixed and asked what we should do about the lease. Obviously, I should've gotten this in writing and I'm was incredibly naive about the whole situation, but the lady said they would not charge us and we could move out if we were unsatisfied. So...we did. I never heard anything from anyone until this September when National Credit Systems called me. I am in school finishing my BS in Math and do not have a job as me and my husband made the agreement that he would work alone while I finished school. So NCS calls me...demands 2000 in full from back rent. Finally I negotiated well enough to get her to accept very low monthly payments as I explained I do not have a job (they have not tried to contact my husband so at this point I'm leaving him out of it) Well, when I go to their website to make a payment it doesn't work. The only other payment options are sending cash (western union) or paying an extra 40 bucks for a debit card over the phone...yeah right! So I call to ask why my information isn't being accepted on the website and she spouts off my information and I realize she doesn't have my correct SSN, I told her it wasn't correct and she says she can't fix it...I never give my actual SSN. I had sort of just forgotten about it over the holidays until today when she calls asking where my payment is I was supposed to pay. I said, you don't have my correct SSN and I am not sure about paying it under another one. She proceeds to call me a bad person and tell to pay my debt blah blah blah. I know I should have made sure I had something in writing from the apartment and the agency doesn't believe me about what happened, I don't know what to do ...we really don't have any extra money lately. I was so frustrated on the phone with this woman that I said "F*** You B**** and hung up". Why can I do, or what can they do legally about this debt???