Product: Student loan

My student loan servicer is Navient and I will keep complaining until something is done with this fraudulent company or until i consult my attorney at last.
I have just looked at my history and the loans i have, because they seem like they are just never ending and the amount i owe is almost the same all the time.
The total amount of loans disbursed through the department of education was aprox 58,000. Ever since 2012 I have been paying on them with the help of my family and have even been and still am under the IBR ( income based repayment plan ) paying almost the same amount as you would under the standard repayment plan sometimes less sometimes more. anywhere from 250 to 600 dollars a month with the help of family. I just calculated all the payments I have made and they equal to over 15,000 dollars from 2012 to now. That is in 4yrs and 9months. During the IBR plan the government paid some of the interest on the unsubsidized loan for three years.
Having informed you of all this it would make sense that after all this and over 15,000 in payments since 2012, my principal balance would be lover however i find out it is only paid down aprox. 4000 dollars meaning i still owe XXXX because of wrongful disbursement of payments and fees. Can you imagine if i wasnt in the IBR plan and my family was helping i probably would not have even paid the XXXX off since 2012 after paying over 15,000 dollars in payments since 2012.
My payments are not and have not been distributed the way i wanted to. At some point you could choose and allocate or specify the amount you want paid to each loan after interest has been paid online on their website but now you can not do that anymore. Instead I had to call them each time which i did since 2012 and tell them how to apply my payment over the phone and you would just have to trust customer service after that. My payments however were not applied accordingly.
The other thing is on their website it clearly informed me that i can when making a payment online " specify the amount thats allocated to each loan. '' but this is not true and is false information. I do remember of having this option before that way i do not have to call them and then or misrepresented. But I guess they stopped doing this because it would not be so easy for them to scam students either through interest or other fees. I even took a picture if this so i have it as proof in case they remove it from their website.
First I thought it was my university financial aid that might have messed something up but then I realised that XXXX/Navient is behind all this.
Just imagine. How can it be affordable or logical for students to get an education and trust these people with their finances and many stories like this out there? USA, Navient, this is not what education is about. Education is not about making a business and meanwhile scamming students. Education is about learning and giving people an opportunity to better their life not make it worse and impossible to pay off a " student loan ''.
I have also asked several times for interest reduction and I was told that it is congress that sets that and I can not get current rates and only those rates that were available when I first started school. My interest rate is aprox. 6.6 % with automated payments and my mother is paying her car loan at 0 % and her house at 3.4 %.
Last time I talked to customer service i was told that I should write to congress instead. I will also do that but. I think I will also be talking to my attorney next time and nobody else.