multiple issues with Navient

I have had multiple issues with Navient since I first took out loans with them. I was lied to in the fact that I was told upon repayment income contigent repayment was an option, it was not offered to me. It took my cosigner and I approxiametly 5 years to setup a reasonable payment option with them. I feel part of the problem is their customer service. Most often reps are not consistent or accurate with information being provided, payments are not posted properly causing account issues. In my experience it generally takes 5-6 phone calls before an issue is resolved, key information is rarely provided in the first call. Each time you call back with the representative you deal with has a different explanation, or different interpretation of the notes on your account. The also hound you when there is an issue payment or otherwise, I understand it is necessary for collection purposes however, they should only contact the authorized numbers on file. At one point I worked in a call center with no direct extension, somehow sallie mae found my managers number and call him multiple times within a shift which caused me problems at work, this number was not authorized for sallie mae to call only my home number. This companies customer service is deplorable. I also had the experience today 1/4/2013 to speak with a representative names Caleb who was rude and raised his voice to me. I have struggled with finances and my complaint with sallie mae has nothing to do with that, I understand they are a company that provided me a service and I own money thats fine. Again it is their customer service that is a problem to me. The current issue I have with them is where a payment was cancelled, it was confirmed for me it was cancelled. I had to call back in November to setup a new payment the amount was $420.00 for december. The agent advised this was all set provided a confirmation number. I called on december 28 spoke to rep Ginger who advised the only payment on file was $319.36 scheduled for 12/31/12, I was upset again the amount changed but if thats what was scheduled and set thats fine. I was alos told I could no longer do checks by phone only debit, which i agreed to and provided my information. On January 1, 2013 when I checked my bank account I found a charge for $319.36 as agreed and also a charge of $631.60 by check. This not only caused my account to be overdraft, caused me in addition from my bank a $70.00 overdraft fee. This issue has now effected my finances for rent, car etc. I am now in the process of dealing with SAllie Mae to get my money back for the $631.60. It has taken me 6 seperate phone calls from 1/1/13 through today to come to a potential resolution. Reason being I am never given same information twice, all of the pertinent requirements are not given in first call and representatives do not properly document acccount. I was not told on 1/1/13 by Elana to intiate a refund request a copy of my bank statement was required she advised. Due to my previous experience I called back today when money was not returned to my account just to confirm it was processed and simply waiting for deposit only to be told after 2 reps that the check copy or bank copy is required. I have emailed the information asked for and was advised a 24 hour turn around time to process. Again my chief complaint with Sallie Mae is their customer service, note documentation and inept representatives. Their mission as customer service should be to provide first call resolution, accurate responses. I advise anyone I know taking out student loans not to work with sallie mae.