Make a strong sop describing this situation in it. So they can better understand your future plans and choose course only related to your previous studies, like the course from which your progress can be made from what you studied previously.
We can only help if you provide your full details e.g your qualifications, background, ielts, course chosen and any other information which can be useful.
Nobody can tell you your visa chances, if your course is related to your previous studies and you can convince visa officer in your sop and most important if your documents are well sorted. Then it will be absolutely fine.
Mine was also refused. Don't worry, keep good intentions in heart and also faith in god. God knows best about you, trust me and please update if anything happen. Good luck to you ☺️
You can do nothing but wait or contact them,but they will release when they want to. You did mistake by booking flight in advance. You can cancel your flight if it is refundable.i have my passport but still not booked flight.