First Credit Services Inc. Debt Collection Complaint

First Credit Services Inc. Debt collection department,

Other (phone, health club, etc.) Communication tactics Frequent or repeated calls Virginia

I have received at least 2 phone calls a day for the last 2 months from different numbers saying I owe a debt to - ( that I am not sure I owe ), when I or my husband ask who is calling I get no response, I asked them to send me a letter verifying who they are and have not received any letters. They very rarely leave voice messages but threaten my credit and legal action when they call.