95% of my requests were responded this way. I am pro se in arbitration in a labor case on issues of discrimination, retaliation, and constructive discharge. I have no money for an attorney.
Send a letter to the other party's attorney telling them you need the answer within a certain period for example 10 days or two weeks of the date of your letter to them. Offer to talk about the information and why you need it. See if you can work out a deal to get all the information or your most needed if the request was to broad. If no resolution, file a motion to compel the other party to answer with the arbitrator explaining the issue and why you need the information you seek. The arbitrator should order it produced if it is not otherwise objectionable.
Can you have 2 court Judgements out for the same account? And how many years do they have after the account was open to persue for collections?