XXXX XXXX and XXXX had XXXX loans with XXXX XXXX, when they split into the Navient they screw up my payments, would send XXXX to Navient and XXXX to XXXX XXXX, per the addresses they provide me. Well all the payments I sent to Navient were getting credited to the XXXX XXXX XXXX account. I called them and they said I had to send them proof that I sent the money, and to up-load the cancelled checks. Went online to upload documents as they told me to, but there are no options to upload the docs on their website. Called again, had to explain the story XXXX or XXXX more times to different reps. They kept on passing the buck around to different reps. 
Finally a rep told me there was no place to upload docs as the other reps told me to do ... ... Straight up lies. Finally talked to a rep, who told me to send separate payments to different account numbers, XXXX to Navient and XXXX to XXXX XXXX. These companies should be shut down. Customer service is on par to XXXX. XXXX different companies under XXXX umbrella.