Unfortunately the simple act of calling you when you are on the DNC list and mot leaving a message is not illegal.  No DNC violation occurs until they attempt to sell you goods or services during the phone call although if there is a history of sales calls from a particlular number there is a presumption that other calls from that number are also sales calls and can be reported as such.  But, you need to know the name of the company and what they are selling to make a valid complaint.