Substitute for jaggery in chutney
I believe you meant "Jaggery" (aka Panela) a unrefined cane sugar product.  If so, I would suggest a "Muscovado" sugar, as it is whole or partially unrefinued cane sugar.  You may need to experiment and blend between dark and medium muscovado to get the taste you desire.  I suggest either try a medium brown muscovado or a 1:1 ratio of dark and medium brown muscovado sugar.