ANSWER:

It’s not permissible at all to not pray until you fix your pronunciation. Deliberately abandoning salah is kufr.

Pray to the best of your ability. 

I have my board exam next month,i cannot recite surah fatiha with proper pronouncation,i cannot pronounce the letter daud ,also i don’t know how many mistakes i made in surah fatiha.once my exam finishes i will get a quran teacher and fix my recitation then, can i wait for these long to fix my recitation, as i am busy studying for my test