DC Services

I have been receiving numerous phone calls from DC services re: an outstanding student loan that I am currently in default. So-I take full responsibility for this as I was young when I was in college. Anyways, the call rep request that I pay $190 a month. I explained to her that I am currently not working but I would be willing to pay $75 per mth. The rep stated I can send in what I want but she will not enter a payment arrangement without certain docs which includes copies of my banking statements. I told her that is unacceptable and its also private. Also, they refused to send me correspondence through the mail. Citing I have to find a place where I can receive a fax form from them as well as download their docs from the internet. I explained I have no printer nor do i have access to a fax machine, please send form(s) through the mail but i would not submit my banking statements. The rep became extremely rude and unprofessional. she hung up the phone, i called back and asked for a supv (this part is unbelievable) the sup was worse and hung up the phone on me 4xs. I have never experienced such rude and unprofessional behavior I cant go through NYSHE because they sold the loan to this ridiculous company. what can i do besides change my number.