Can't remove wheel from wheel hub

I had a flat tire and a lug nut that was stuck on the lug which was stripped when attempted to remove. The nut was then chiseled in the second attempt to remove it. The only other thing that came to mind was by way of torching it but the shops I've contacted have refused to do this. Are there any other options to remove the wheel? It's a custom wheel I don't mind any damage to the wheel as I need for it come off to put a spare on the car....