Mandarich Law Group, LLP Debt Collection Complaint

Mandarich Law Group, LLP Debt collection department,

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

I have been receiving collection letter from mandarich law group for over four years trying collect on a debt that I do not believe is mine and even if it was mine statue of limitation on it has passed. even though I have been asking for debt validation on this account I have not been receiving no information on it. Also every time I look at my credit report I see illegal credit inquiry by mandrich law firm. What mandrich law firm is doing harassing me by their tactics to lower my credit score.