Ok, so now I am even more confused than before

So I sent letter #1, to which I got the generic response in the first post above. My response to that was to send letter #2. Two days after I sent letter # 2 (they crossed in the mail) I received another letter from Chex that said the following:
"Dear ChexSystems Victim,
This letter is to inform you that the reinvestigation of the information contained in your consumer file at ChexSystems is complete.
The disputed information submitted by Mr. Bad Bank has been verified as accurate and complete as reported therefore it has been retained in your file. The source of the information has requested that you contact 1-555-5555 or 1-800-555-555 to obtain documentation or additional information.
If requested by you Chexystems will provide you with a description of the procedure used to determine the accuracy and completeness of the disputed information in yoru file etc etc etc."As I said, I already sent letter # 2 only two days before which I figured it would really serve as a response to this letter instead of the stall letter they sent first. Letter #2 of course states:
"Consumer Relations Dept.:
This letter is in response to your recent claim that (Name of Bank) has verified this account to be mine. Yet again, you have failed to provide me with a copy of any viable evidence submitted by (Name of Bank). Be advised that the description of the procedure used to determine the accuracy and completeness of the information is hereby requested, to be provided within fifteen (15) days of the completion of your re-investigation.
Additionally, please provide the name, address, and telephone number of each person contacted at (Name of Bank) regarding this alleged account. I am formally requesting a copy of any documents provided by (Name of Bank) If (name of bank) does not validate the debt as per FDCPA § 809, it is a violation of the FCRA § 611."
So today I receive a response to my letter # 2 which says:
Dear ChexSystems Victim,
This letter is in response to your recent request for a description of the procedure used to determine the accuracy and completeness of the information in your file which ChexSystems previously reinvestigated.
The procedure used is outlined as follows:
Upon receipt of your dispute, ChexSystems contacted Mr. Bad Bank to provide notice of your dispute. In addition to our review and consideration of all relevant information provided by you during the reinvestigation, we also provided the information to the party(ies) identified in the preceding sentence, and we requested them to conduct an investigation with respect to your dispute and the relevant information. Such party(ies) then reported the results of their investigation to ChexSystems.
Also, this letter is in response to your request for information regarding the source of the information contained in your consumer file at ChexSystems.
The information pertaining to the source of the information is listed below:
Name: Mr Bad Bank
Address: 123 Street
Your city, your state 12345
Phone Number: 123-456-7890
Etc etc etc…..So what now? They didn’t provide anything requested other than the name of the bank. No evidence, no documentation, no nothing. It would seem letter #2 is the most appropriate response to this but should I send that again?
Help is greatly appreciated as it seems I am at an impasse here…(sorry this is so long)