I bought a Mercedes Gl-450 From Texas Auto North a...

I bought a Mercedes Gl-450 From Texas Auto North and an Extended Warranty From First Extended Service Corp. A control module went out that controls the transmission, I was advised that that Part was not covered per the contract and that they would pay nothing, The Service rep on the phone got angry with me when I asked questions, wouldn't answer about an appeals process. The single most unprofessional organization I have eve dealt with