People Finders Sold my personal information to telemarketers, Internet

 I placed an order with People Finders on the 15th of January. 2 days later, which was a SUNDAY, I started getting strange phone calls where people wouldn't answer. I googled these numbers, and found out that it was from a telemarketing company. All the people who had received calls from them had also placed orders with PeopleFinders.com. They are selling their customers' information to third party companies. There is a check mark box that says if you want to be contacted by third party sponsors, and I made sure I checked no.