Nelnet Debt Collection Complaint

Nelnet Debt collection department,

Federal student loan Improper contact or sharing of info Contacted me after I asked not to Maine

My student loan had been discharged -/-/2010. Nelnet claims I did not contact that last year and so without warning since -/-/- they have been taking $150.00 from my - check which I am barely living on. Said I have to re-apply. I did and have also shown proof of emails where I have tried to contact them in past - yrs. I sent everything they needed in the packet. I have called several times each time they have my wrong address. Each time I give them the correct one, although the mail gets to the right address. I have - of which I have been working very had to stay off - medications but these people keep sending letters saying I forgot this and that when I have copies of everything I sent them. I volunteer at - - - and they helping me but I just got another letter from them saying they ca n't process till they have section - from the Doctor which was sent in the packet. I called and it is because the doctor did not write - , he wrote - . This is ridiculous.