I received a private loan from XXXX XXXX in 2010 for my undergraduate studies at XXXX XXXX XXXX. Upon graduation, I attended XXXX school at XXXX. I eventually deferred my loan repayments ( which took months ). I recently found out that Navient took over my loan repayments ( XXXX XXXX did not inform me ). Since last week, my mother ( co-signer ) and I have been receiving calls from Navient, not during business hours, about paying. I logged into my Navient account for the first time today and it said I defaulted of my XX/XX/XXXX payment which was supposed to be deferred since I am still in XXXX school. Now i have to re-apply for deferment which I fear may take months and may negatively affect my credit score.