sorry but that didnt make any sense
have you disconnected the ball joint from the hub ok?
or is it the lower arm main bolts where it connects into the subframe and chassis your having issues with?
if its the pin in the ball joint thats refusing to release, use a chisel(or screwdriver) and hammer to knock it out.
there is a special tool to break ball joints free, its a slotted chisel (with or without a clamp with bolt to allow manual winding to force the ball joint off the hub)
if its the main arm suspension bolts then you have a problem, you may have to cut the chassis open to remove the arm (i dont think there is any way to get at the nut behind there), and replace it with stainless steel (at least 2 layers of 1.0-1.5mm thickness (its structural so must be reinforced and seam welded) with a new nut welded inplace behind them.)
this will involve fitting the arm on to get the position of the bolt/plate correctly postiioned.