Verified person Not a capable company for references check Memphis Tennessee

I had given this company my past employer to verify past employment and this company insisted no one returned their phone calls and wanted me to certify employment by providing them with my W-2 Form as well as 1099 or paystub by either faxing or scanning it. I would not advised anyone to give this information to dot com company. If this company claims they have the capability of providing information on past employment verification, why is it hard for them to contact a major hospital in Manhattan,New York whereas I did and had no problem speaking with employment certification dept. It appears this company does not have the necessary resources to do this.