<human>: Give me the gist of the text in a nutshell

I pulled my credit report recently and saw that my federal Perkins loan had been sent to collections (I'd had it in deferment for a while, then never received further communication regarding it after having moved a couple times... so I kinda forgot about it.  I am an idiot.).  Wanting to clear this up, I called the university's Student Accounts Office, which was listed on my credit report as the holder of the debt.  Student accounts office says that I need to contact the company they use for loan servicing, ECSI.  Makes sense, as that's who I was making payments to before.  So I call ECSI, and they inform me that they transferred the debt to a collections agency.  No problem, I just ask for the agency's phone number so I can get ahold of them.  Call the number given, get an answering machine, leave a message.  Wait two days, get no returned call.  Call ECSI to ask about the collections agency contact information again.  They give me a different number to the same agency.  Call that number, person informs me that I've called the wrong department.  Gives me the number for the correct department.  Call THAT number, talk to a lady who pulls up my information and then informs me that they had transferred my account back to the university Student Accounts Office.  They advise me to check the NSLDS site to ensure who currently holds the account.  I check the site... No Perkins loan listed at all.  I guess I'll call Student Accounts again today, but I doubt they'll provide much more information this time than they did the last.  So how the heck am I supposed to pay this damn loan??
<bot>: Student Accounts says to pay ECSI.  ECSI says to pay collections agency.  Collections agency says to pay Student Accounts.  NSLDS says the loan doesn't exist.  Credit report disagrees.