I would appreciate some help. I'm trying to book a KUL-SGN one way flight on Malaysia Airline website. I have selected my flights, entered all details and then when I click on continue instead of progressing to 'Pay' tab it keeps returning to 'Book' tab.

I called Malaysia Airline and they will charge twice as much as its not a special web booking.

Is there any way to progress this through the web?

Thanks.