Bangalore University — Admission fee payment debited two times from my account

Address:

Jnana bharathi campus bengaluru university karnataka 560056

Respected sir
My name narayana r i am a student of 3rd year ba in bangalore university on the date of 09/09/2021 i made the online payment for course unfortunately i have face some technical issue when i making the payment first attempt showing error message (We unable to process to transaction) after that i try to make payment once again this time transaction was compete successfully i got the receipt for that, now my issue is amount debited from my account for both transactions which is first one transaction shows the error message for that transaction amount has been debited by my bank account each payment rs-4675 debited twice next day morning i visited to university contacted respective department (Computer section) they are checked in computer told me that two payments are credited to university within one week one payment has been refunded to your account i returned after 15 days i visited again they are told it will be refund in 10 days from past three months i visit 5 to 6 time i got the same answer once i mailed regarding my issue after long time i got the reply which is suggest to contact mr subramanya sir in account section i contacted they are told me it will resolve in computer section, on the date of 25/11/2021 i visit again to computer section this time they are suggest me that procedure has been changed you need to give a letter in writing with attest by your department and account section i do that one also and give a letter to mr anirudh and geetha in computer section they says within 10 working days refund will be and transfer to your account, now already above one month over still i did not receive refund amount i made phone i got answer is contact mr subramanya sir!! I disappointed too much because i spend too much time for resolve my issue visited so many times in my opinion it was injustice for me finally i raise a complaint here hoping my issue was resolve as soon as possible, i attached some photos regarding my issue.
Thank you.