Gauhati University — Result error

Sir/maam
I have submitted my exam pdf on time and since it was during the pandemic and online exam was going on I passed all the subjects but failed in two of the subject which led me to arrear in my 3rd and 6th semester results I have already contacted the college authority but they ignored saying I have to appear again which is really a delay in my academic year since I have appeared the exam and not absent which I can proof with screenshots please help me kindly
Thank you