Getting calls from this number without leaving voicemail..

They left a message today and yesterday...It is imperative that we hear from you or your legal representative immediately... There is a case pending against you... We need to have a statement from you...Press any key to be connected to an available rep...
Not once did this lady identify herself, who she works for or who the alleged client is, nor did she leave a call back number...
Don't know who these people are but they are definitely on some wishy-washy agenda...