What happens when partial fill at the end of the trading hours?

I placed a buy order of 1000 shares (SGX trading) during trading hours with "Time in Force" = Day. 500 shares were filled and remaining 500 shares were unfilled at the end of the trading hours.

what happens to the remaining 500 unfilled shares? will it be automatically cancelled or will it automatically be queuing for purchase the next trading day?

If I were to cancel this order, the cancellation applies to the 500 unfilled shares or the entire 1000 shares?

what happens to the fees? will it be charged only on end of day 1 or subsequently will it be charged on day 2, day 3 etc.?

Thank you