C1D visa refused

I have attended C1-D visa interview at Muscat on 26.10.2022 and the very next day the status was updated as “Refused”.
The councilor informed that you will receive email for administrative process, as of today one month completed. I did not receive any email from them. The US embassy, customer care in Muscat not responding properly.
I need to upload my documents before 10th December in my job portal.
Really worrying lot, after a long struggle I got this opportunity
Anybody can help

Vetriyalagan sundharamoorthy