My 2017 chevy aveo has no heat

What is your question?

My 2007 chevy aveo has no heat. I replaced the heater core, the the thermostat. Still have cold air. Any suggestions?

What makes this problem better or worse?

Bled the lines, still no heat.

How long has your 2007 Chevrolet Aveo had this problem?

Just bought the car and this has been going on for the last couple of weeks since I bought it.