Law / Want to go back to India for my sister's wedding. Karta pobytu and immigration help. [3]

hello everybody
i am final year student of aerospace engineering in politechnika warsaw
i have applied my karta pobytu already meanwhile i booked a ticket for india as i have my sister wedding , , but it comes out that i have negative decision , so i have to appeal it again as they need my bank statement again , so its not a problem i can give them now , but only problem have is that i dont wannt to miss my sister wedding and this is on 28nov .

i have process stamp on my passport which they started recently (they dont give process visa anymore) , this stamp allows me to travel to my country on in direct flight (thats wired some of us dont have directly flight like india china afraica )

as der is no direct flight from wawa-india so i have wawa-istanbul-delhi 24nov return on 4th .(ticket money is non-refundable too)
so can i leave this country with my process on . (i can give the power of attlernoy to my lawyer )
plz tell me the best , i really wanna visit my sister wedding
i have my collage also but plz advice me the best shortest way , getting visa from india will take one month and stil now sure wil get it or not so studies can be totaly dead

plzzzzzzz helpp