Nissan Motors — Unethical behavior

I paid my loan off in full .. all regular scheduled payments that were due . Listed were " misc fees " ... not " due " not " past due " just listed as fees totallly around 700 plus . Throughout the loan I did incur a intermittent late fees .. i have spoken to rep on sev occassions regarding this and was told dont worry about them, just make your payments and " your good " I was never late enough that caused a credit report of late payment, was always paid within month due . I had discussed with them circumstances and was always told it was not a problem, it could be " rectified " at end of loan . So .. loan is paid off an all of a sudden these " misc fees " are showing a past due !! I tried to chat to get a email to correspond with someone and they will not provide an email .. they claim is not avaialbe. That is impossible they do not provide an email for the consumer to contact them . They want me to call and I am not able to do that . I tried to chat several more times and the chat agents just disconnect me online at this point . This is ridiculous . I do not have 700 to pay these fees I was told not to worry about, these fees were always miscellaneous never not computed into the payment due ... now all of a sudden past due and I can not contact them to try to work something out . Shameful I would like to negotiate the fees given the circumstances . I am able to pay 1/2 amount due and request additional fees be waived given the circumstance and how I was misled. Thank you