Sv06 plus thermistor broke

Hi :), my thermistor wire on my sv06 plus broke while I was trying to clean up petg that had covered the hot end and wires and caused thermal runaway issues.
I have ordered a new thermistor to install, I’ve removed the screw just below the thermistor but am unable to get the broke thermistor out, it seems soldered in or something similar. And I’m unable to get the hotend off due to the hex wrench breaking off inside while trying to remove it. So I’m wondering if anyone has any advice on how to fix this?

Thanks

Read this thread: Catastrophic Failure