Had something similar. After trying a bunch of ideas, ended up drilling the support around the bolt, the metal is likely much lighter than the bolt itself. In my case it felt like aluminum, so quite soft. The bolt was probably steel, I started out trying to drill the bolt and didn't get anywhere :)
If you don't own power tools you can still try to borrow or rent. Get a metal drill bit with it (or buy one).
oqp8 t1_j6h4mw1 wrote
Reply to How do I remove a stuck bolt holding my bike's kickstand in place? by S_Orbital
Had something similar. After trying a bunch of ideas, ended up drilling the support around the bolt, the metal is likely much lighter than the bolt itself. In my case it felt like aluminum, so quite soft. The bolt was probably steel, I started out trying to drill the bolt and didn't get anywhere :) If you don't own power tools you can still try to borrow or rent. Get a metal drill bit with it (or buy one).