Credit card company suing me for nonpayment?

I am being sued for nonpayment. I consolidated my to CC's into one 2 years ago and paid it off. I asked the bill collector to send me proof that what they are suing me for was for the same account that I paid off with them in the past and all I got was a list of all the charges. I don't have any files to prove what I paid off was for the same account. Also the court date has been moved back 4 times because the cc company hasn't been able to provide its lawyers any contract with my signature on it. Do I have a shot at this in court? They won't take any payment arrangements.