changing terms of agreement

In 2010, after I finished college, I took out a home equity loan to pay a big chunk of my loans off  since the job market was not so good.  At the time I made a lump sum payment, I was told my loans with the Dept of Ed would not be due until 2015.  That gave me time to get a better paying job.  However, they demanded payment in December of 2011. I decided to make my payments, because I did not want a bad mark on my credit and they acted like they didn't know what I was talking about when I called them.  I am still employed as a teacher assistant making very low wages and searching for a better paying position.  In the meantime, after 6 months of making payments on the loans, they are raising my graduated payments although I am still struggling with the same low wages.  It was my understanding, the payments would not be raised for a year.  In addition, I asked to have all my loans consolidated and they added an additional $10,000 to my loans!  They are stating it has to do with a posting error from the servicing company handling the consolidation and they don't have a copy of my loan.  They are asking me to fill out additional paperwork because of their posting error!  Does that make sense?  I have not received the paperwork yet, but I am very frustrated with this company.