Got a call from a Donald Oliver numerous times so I returned the call and spoke to a Steve Hogan.  Mr. Hogan was very rude, cursed at me and threatened me.  I remained calm and asked to be mailed proof of my debt.  He refused and said he would only send something after I pay him.  I refused because to pay before proof didn't make sense to me.  They then started calling my job the same day and tied up the 2 incoming line to my department.  My boss told them to stop calling and what they were doing was illegal.  My boss then called me and told me that this has to stop or corporate would get involved.  I then called back on our recording line and I think it spooked them because they said I had the wrong number, hung up on me numerous times and finally cursed at me again and said they would mail something and hung up.  I doubt they will send anything and it seems like they will do anything to scare or embarrass you into paying.  Do Not Fall For This!!!