I have issues with a defective three month old doo...

I have issues with a defective three month old door lock. I called tech support and it was determined that the lock was defective. I tried to arrange a service tech but none were available in my area until after new years. I went on my ski vacation and just returned. I called to schedule another service call to replace the door lock, a high heat sensor, the house thermostat indicates the set temp for heat and ac but not the actual room temperature so my furnace went off and I was not alerted to the no heat problem. The service dept rep tried to get me to pay for the service call and I refused to pay for a new system the does not work properly. We will see how the service call goes in 8 days.