Poor service at a very difficult time

my father passed away in December 2014. when enquiring about his debt with mbd inc the so called lady on the other end of the phone started yelling at me. This is not my job, I don't have to go out of my way for debt that is not mine. I asked to speak to a supervisor and was told no and she put the phone down. Where is the common decency to be kind or sensitive to matters like this. I'm truly disgusted with the service.