Encore Capital Group Debt Collection Complaint

Encore Capital Group Debt collection department,

Credit card Disclosure verification of debt Not given enough info to verify debt California

I have called and talked to the company I am seeking asking for a detailed statement for the past 3 months of the account before it went into collection so that I can verify how a - credit limit credit card became $1100.00 the agency has refused to go back 3 months or take a settlement offer of - and the least they would go is -. I would like detailed statements of how fees or interest were accrued and verify last purchases before collection