@Miljer *******
it really depends on the goodwill of Immigration. You got stamped in wrongly. Normally, Imigration does not correct wrong stamp, they will tell you to go back to the airport Immigration to get iot corrected. But MAYBE , if they refuse to correct the false stamp, they might offer you the "application to extension denied, you have 7 days to leave the kingdom" stamp. As a Bangladeshi citizen your only option is to fly back home, curfew or not. Ask the Airline if they fly you back. Don't ask on Facebook