I applied for Change of Status from H4 to F1 on 18 Nov 2016 with Program Start Date as Jan 01 2017. However, I did not get any reply from USCIS till 10 March 2017. On 10 March 2017 I got RFE which mentioned that SEVIS status is cancelled. I contacted my university and they have raised request to update my SEVIS status. My concern is how manny days does SEVIS take to update record as I have been given only 3 weeks to reply to RFE. Can I get it new I20 with same SEVIS Id within the time frame?