Meritage home builders Will not repair circuit that is tripped Goodyear Arizona

I had a uv air cleaner installed by a company. Later maybe two months the circuit tripped. Meritage sent out a electrician they changed the circuit breaker but would not go inside due to coronavirus. I did not plug uv air cleaner into that circuit and it tripped again to a point you can't reset it. They sent out another electrician told me to turn all lights on that circuit on , including the uv air cleaner which had not been plugged in since the first circuit tripped.

He said I overloaded circuit it was my fault. I said uv cleaner not plugged in. Electrician did not go inside to check any switches or plugs only check main box outside.
so Mertiage home builders set up another appointment for three weeks out and it was a no show on electrician. Now they said was my fault and will not repair under warranty . Bogus they are finding easy way out and have not checked switches or plugs in circuit which I suspect one is bad or a wire touching.