Administrative error leading to denial of application

Can someone help me out ! I applied for an adjustment of status application for myself to get permanent residency based on marriage. I requested to reschedule the interview date that was chosen for my interview and the reschedule request was accepted and acknowledged by the USCIS. But today I have received the denial notice of my application stating that it is being denied because of no-show on the interview date. Can someone tell me whom to contact to rectify this error or how to rectify this error.

Thank you