Composter Problem

I wondered if anyone on here had used one of the following
green cone compost maker
There is one in our back garden which was left by the previous owners.I tried to move once but was solid and so I left it.We are now doing our back garden up and would like to get rid of it but just cannot move it.Tried putting a crowbar under it but that did not work.Have just tried putting an old spade under it but all that seemed to do was break the walls.When you look into it there is nothing in it.Have just looked online for some imfo about it and it says it comes in two pieces one piece is buried in the ground and the cone fits on top or that's what it looks like.The only way I can think of is to get my sledgehammer out and break the cone up.Has anyone on here got any ideas.Thank's

 

A sledgehammer is good, with a reciprocating saw as back up

 

Never come across one of these, but I'm guessing destroying it will probably be the best way.