I sent a letter to NCS-National commercial services - onto XXXX XXXX,2015 in an attempt to resolve a claim against me. I wrote in that letter they could ONLY contact me in writing at the address they had on file. On XXXX XXXX,2015 a representative from that company left a threatening voice mail ( at XXXX ) in an attempt " to educate me '' concerning the claim. They threaten to have my license taken away. The persons name was XXXX XXXX at ext XXXX.