[2012vengaman]

This exact problem (vehicle fires)has hit headlines with Vauxhall Zafiras. I think Vauxhall were ordered to do a recall for the resistor pack as it was so common (relatively speaking) .
For yours to go twice suggests there is something a bit deeper going on and hopefully Kia head office in your part of the world will authorise your dealer to search deeper rather than just replacing the part again
I have a 2012 Venga and to date no issues with heater controls