Yesterday I wanted to buy <a href="http://www.olx.com.ng/mobile-phones-tablets/phones-mobile-phones/q-used/" / rel="nofollow">used mobile phones</a> on olx. 
I found a Blackberry phone and contacted the seller, he is asked to make an advance payment, and I did. Then he disappeared. 
I have written in support of the OLX and said about scam but they said that I blame myself, how do I get my money back?