People please do not believe any of these claims under this number that these people have helped them out.  As far as the David comment, yes he works for them and they are only interested in scamming you out of your money.  See this below:
He is a scammer. He has nothing to do with the creditor industry. He bought your information off the internet. He wants to steal money from you. Tell him so that you know he is a scammer and you are reporting him to Homeland Security. Tell him off. He is a thief. Read the report from ABC NEWS below..

ABC NEWS SCAMMER REPORT from Terry
Fake Debt Collectors Terrify Consumers
Alleged Debt Scam Calls Threaten Consumers: 'Only God Can Help You Now'


Scammers masquerading as debt collectors and law enforcement officials have terrified consumers with threatening phone calls and bilked them out of thousands of dollars, officials with the West Virginia Attorney General's Office say.
Prosecutors said that the scammers, who speak with heavy foreign accents, are known for repeatedly calling people at home and at work and threatening them with arrest if they don't repay supposed debts -- debts that, according to West Virginia officials, don't actually exist.

The scammers operate under names such as U.S. National Bank, Federal Investigation Bureau and United Legal Processing The callers also have invoked the names of actors Denzel Washington and Steve Martin, people who've received calls    The scammers have been impossible to track down, but ABCNews.com spoke to one man who claimed to be associated with U.S. National Bank. The man said he works for Financial Crime Division, a company he said provides services for USNB.
The man refused to give his name and gave little information about his company.

The man also denied that consumers had been threatened with arrests.
The group has targeted consumers who took out payday loans through Web sites years ago .
The group has secured consumers' Social Security numbers and other personal information, which may have been stolen from Internet payday lending sites .
What has made the group especially intimidating is its use of phrases that sound like legal terms -- such as "downloading affidavits" -- but, in reality, are meaningless.
The alleged scammers have also invoked God, telling victims that "only God can help you now."
Some of the scammers' tactics are downright puzzling.

Some  suspect that the scammers are based in India.

Thus far , the scammers have been impossible to trace, using a multitude of phone numbers and fake addresses.
consumers with complaints are encouraged to contact the FTC, the Better Business Bureau or their state attorney general's office.