Adjustment of Status - I-485

I called USCIS on Friday regarding my case because my tracking update has been the same since June 28 (Ready to be scheduled for interview) No update since then. They told me usually you receive an interview date notice 90 days after that notice. For me its clearly been well over 90 days so the lady on the phone sent in a service request. She said I should hear something back within 15-30 days! I hope something good comes out of this service request because my PD is 1/4/16. I have to retake my medical exam now! So frustrating have to keep paying for these things with not hearing anything back from them. Also, I sent in my i-765 app in October 2016. I sent it in way after because I do have DACA but that doesn't expire until March 2017. But as soon as October came around & I noticed how I hadn't been receiving anything from them regarding my interview date I figured I should apply just in case I don't receive my GC by March. I haven't received any update from them except the fact that they received my application Oct 10! I hope I get something before March. So my advice to you all is to please send in everything at once, especially DACA recipients.