Minecraft username: axguy

What happened?: axguy said 'selling silk touch diamond shovel at 1k' i then said 'ill buy it' then i asked if it was unused he replied with 'yes' in the '/ch tr' chat i then said 'meet behind creeper at spawn' he said 'ok' when i got there he said 'pay up'
so i payed the 1k for the shovel then he gives me 10 dirt instead and then he goes offline i then went and spoke to 'Liamfrench' and he told me to talk to u guys and that i cud get back what i lost.

Evidence: http://photouploads.com/images/2012072018.png http://photouploads.com/images/201207iwi.png http://photouploads.com/images/201207mym.png
http://photouploads.com/images/201207mwm.png