They are very rude and told me I had to pay the fu...

They are very rude and told me I had to pay the full amount, it to the P.O. Box on the bottom of the letter and hung up the phone. I explained that I just received a letter from March this week because they sent my mail to my father s address and he passed away in December. There was no understanding that I have to wait until family sends me mail so I can handle certain things.