ck*peoplefinders Idk how I got charged 2 times the same amount on the same day for 19.99 Internet

 I bought a Samsung galaxy 4s active on ebay ,turned around and bought 2 screen protectors, and also 2 cases for the same phone because I had already bought one a couple months prior before this happend.. Anyways, I had 40.00 dollars on my Walmart money card Then I called to actually see how much I had and it said .35 cents . So I sent a text to get my transaction history and it came back saying ck*ppeople finders took 19.99 from it 2 times on the 16th of June 2015. Idk why or how ,but I haven't used or tried to use or even seen the Web site or anything to do with it .... I need help with solving this problem . Thank you. John. Fayetteville, AR. 72703.