Since I bought a 2019 Coleman from McGeorge in Sep...

Since I bought a 2019 Coleman from McGeorge in September of 2018, I've had two leaks, a blown converter, and now a problem with my heater. I've called 4 times and have left 3 messages and no one has returned my calls in two weeks. I'm not happy and am ready to label this a "lemon."