You asked for verification and validation. The two most important words here: V + V. And what do you get in the mail? A thick envelope with copies of your statements and maybe of your original contract with the original lender. There usually is a cover letter which blithely states: here is the verification you requested.
This is NOT what you requested. These are copies.
They say they verified but did they send any documentation? And if they sent documentation, is it verified?
Did this documentation include an affidavit swearing that the provided documents are correct and accurate?
Just because they answer that your dispute has been “verified” does not mean it is so. Check back what validation and verification means. And those two have to go together. One without the other is worthless.