Help with validation response, etc. again

I hope I'm not sounding too stupid, I have been reading but very new to this. We received a letter from Hudson & Keyses in response to our validation letter. All they have said is "the following information will verify the debt we are attempting to collect" and included the name opened under, SS#, original lender (who was Chase Bank), original card #, date acct opened, late last paid to original lender, original creditors address, charge off balance (which is $5,590.05 and charge off interest rate of 24.00. It says "hopefully this additional information will refresh your memory concering this debt. If we deem it necessary to obtain documentation as a voluntary effort to assist in revolsing your dispute, we will provide you with copies of all appropriate documents." Then across the top of the form letter it says current balance $7,387.45.

My question is can I/should I follow-up with a letter asking:
What the money you claim I owe is for.
Explain and show how you calculated what you say I owe you.
Provide me with copies of paperwork showing that I agreed to pay what you claim I owe.

Also, when doing some research I noticed that at some point Chase must have liened the house or tried to take us to court because there is a document of "Notice of Voluntary Dismissal" by Chase. It just states Plaintiff, chase Bank, by and through the undersigned counsel hereby gives notice to the court of its voluntary dismissal of the above entitled cause and is dated 17th of September 2007.

We do owe some money to Chase but it is so high now that there is no way that we can settle or make such high payments. There are 3 of these cards we owe about the same amount on.

Any suggestions or help would be greatly appreciated.

Thanks so much!