I am writing on behalf of our business, an auto dealership, regarding harassment by a collection agency which arose out of billing errors on old invoice for transport services. Accounting needed to verify appropriateness of old debt invoices that were sent almost 2 years after the fact and paid all old invoices directly to the company. A balance remained that was being investigated and company referred the matter to collection agency with no notice to our company. Debt collection company claims entire amount assigned to them by other company including amounts already paid directly. Refused to investigate actual amount in dispute, threatened and harassed comptroller and contacted the undersigned using the foulest of language, screaming and repeated calls after written notification that the amounts were in dispute, to return the debt to the maker, and to cease all harassment.