Wrong value entered in nil rated supply

write  to  " cbecmitra.helpdesk @ icegate.gov.in "  email  of  Central  Board  for  taxes .

they are unable to give proper soultion to it..
if anyone could help me regarding this then plz let me know..

no mistake in GSTR 3B
mistake was in gstr1 

there was no NIL RATED SUPPLY by us and still by mistake our consultant made entry of  above mentioned amount in that head..
so plz give a solution for this how should i rectify it

sir plz clarify 
deadlines are just due

Call  to CBEC help desk  Phone no 18001200232  (Central  Board  for Direct Tax ) 

Phone number given above is of  CBEC   Indirect  Tax  not  Direct  Tax .