This is a collection agency.

DELAWARE CALL (Caller ID Name)
Integrity Solution Services, Inc.
(Formerly)
National Asset Recovery Services (NARS)    
(Owns) Integrity Financial Partners, Inc.
Corporate Headquarters
20 Corporate Hills Drive
St. Charles, MO 63301
(302) 648-1078 (Caller ID No.)
(636) 530-7985 (Office No.)
(800) 732-6877 (Office No.)
www.narsnet.com
www.integrityifp.com

This caller is relentless with their calls even at work, which I thought was illegal anyway,  

These people are relentless to the fact they sucker call you and they don't give you the name of the company, the representatives name, what the call is about nothing. I keep telling them, if their is a legitimate  claim to send me a verification of debt and if it is legit then we can work something out, I have received calls while at work, asking for me at work. I have it with these Telemarketing Bozos if this was 20 years ago I would find out who this is and put my military boot right up there [***] !

Just received a call from this number the person who called name was carolyn williams. I pretended to be my secretary answering the phone, she left another number 678-500-8681 for me to call. U will be looking this number up next.