Newly installed garage heater defective. After ba...

Newly installed garage heater defective. After barely 2 months use the heater is stuck on. Came home to a garage in excess of 90 degrees. On call person acknowledged that it was just put in and stated she wasn't sure if it would be covered by warranty and asked me to make a decision if I wanted a repairman or the warranty specialist to follow up. Wow, talk about not standing behind your work! Hoping the follow up is better than the on call. Also hoping your heater doesn't burn my house down.