Adjustment of Status - I-485

My PD is 21st Feb. 2017. One RFE. I called USCIS yesterday. They said my time would reset. But first customer care person took pity that I have a job interview on 20th and decided to do a service request on my behalf. Immediately she said 'hold on' the phone went off.

I called back but a different lady answered the call, went through all over with me on the usual questions. Then said since it's initial not additional my PD automatically resets. I waited to hear her say she would assist me, yet she didn't. I also tried to ask for her empathy. She didn't obliged but said I should tell my prospective employer to give me grace period. That once it's 75days from the day USCIS received my RFE response, I give them a call back for a service request. So I gave up. But she was literally empathizing with my tight situation.

I want to visit my field office at Manhattan tomorrow with my letter of interview invite (just an email no company logo). I want to head their with God's grace and faith. Mind you, I have an interview invitation which says I come with a photo ID which the security will take a look at, at the company's gate. I don't know what to present. This test invite came as an email, so no company logo. What can I even show as proof of hardship or whatever that means? Anyone with some words of advice and encouragement?