Bangalore University — Regarding marks card

I completed BVA interior design from Bangalore University. I haven't received one subject marks from 3rd semester which I completed in 2017 December because the university typed the subject code wrong. I graduated in 2020 may and i have been trying for marks card since then. No progress till date. I have submitted around 30 letters from my college to the university and visited college around 30 times as well but no update. I couldn't go for Higher studies last year even after getting admission from a top University in UK. Please help me solve this problem.