My blower motor was wired wrong and fried my therm...

My blower motor was wired wrong and fried my thermostat when powered up. They bandaid it up and my blower motor stayed running even when it was not calling for it. It took them almost a week to get a new motor and wire harness and now my heater not working. This is the fourth time a tec is coming out . Hope they fix it right this time.