Disputing OC

So, we had two vehicles financed through a bank in Arizona back in '04. Long story short...after refusing to accept two (full) payments they repo'ed both of them.

The vehicles were both sold in auction back in late '04. We've received letters and calls since to get us to pay the remaining balance. However, I haven't. I've always asked them how they could refuse the payment before repo'ing and then want us to pay NOW. Plus we've received NO information on the sale of the vehicles, just what they say we owe.

About 30 days ago I sent a letter to the OC asking them for any sort of information. Telling them that we need proof of the debt and the remaining balance of the acct. In summary, they replied with the date we first opened our account with them (not the date of the vehicle purchases). They also said they refused to "comply with our request". On top of that, in the letter I told them not to contact us during the 30 day time period and asked them not to post on our credit until this can be resolved. They did both. My husband never answered their call but has their message still on his voicemail. Oh, and we have disputed twice with the CBs and they corrected the fact the one vehicle was 90 days late like they had on our report for 4 years (because it wasn't). But that's the only change they have.

So now what do I do?? How can they not provide ANYTHING? To get the information they gave us they can just look at what's posted on our credit report.

Plus, does anyone know the SOL of repo'ed vehicles under AZ law? I've been trying to confirm that they are subject to UCC law with a SOL of 4 years. We now live in NM so I don't know if that would change much with the UCC SOL.

Thanks for ANY help I can get! It's SOOO frustrating!