I received a call from 412-203-8326, they left a voice mail that only said 888-787-4608.  I looked up the 888 number and everyone else says it is a scam.  Has anyone received a call from this number??  I have been scammed in the past, so I am kind of hesitant on answering calls that I don't know without checking the number out first...

They change numbers faster than people change underwear.  As reported in the 888 thread, this group is a known criminal enterprise possibly located in the Caribbean.  They pretend to be debt collectors and try to scare you into paying.  Now since they left a message, that is considered first contact, so they are required to do the following:

Federal law (FDCPA) requires them to send you a letter (US MAIL ONLY) within 5 days of their first contact that contains their name, physical address, the creditor’s name, and the amount of the alleged debt.  It also must contains “mini-Miranda” telling you that it is an attempt to collect a debt and that all information will be used for those purposes.  The one other important thing that this letter must also have in it is that you have a right to dispute the debt within 30 days of receipt of the letter and if you do so, all collection activity must be stopped until the debt is verified.
Read up on your rights here, get template letters to send and also make a complaint at this government site: http://www.consumerfinance.gov/

Also file a complaint with your State Attorney General's office.
List of State AG’s offices:  http://consumerfraudreporting.org/stateattorneygenerallist.php

I have received numerous calls from this number, on top of similar numbers. They even call my dads home phone. I called the 888-787-4608 and some guy answer and stated that I was not allowed to talk until he finished going through everything. Stated that it was a collection agency called Global Service Group collecting on a payday loan for Vandelier Group LLC. When I stated that I was not going to discuss anything with him until I received documents, he literally set the phone down and walked away. I could here him and some woman talking in the background. After about 2 minutes he came back and started his sepal again. Again I stated I was not doing anything until I received documents and spoke with  my attorney. He then stated, "I will process this for litigation and I wish you good luck." and hung up the phone. That was 2 days ago. I submitted a complaint to the BBB, FBI, and my local authorities. However, I still have received phone calls every 5 minutes from the same phone numbers.

Repeat calls from this number leaving messages that I need to return a call on a claim.  When I call back - it's just music.

Received 3 calls from this number today. It's a scam I asked what the company was and they will not tell u a thing. They keep trying to get ur info. It's total bs a legit conan will identify themselves