Air India — uninformed flight delay causing me to miss my connecting flight

Respected sir/ma'am,

I, borrisson mihsill kynjing, a student of 'national law institute university, bhopal', roll no. 2016 ba llb 129, am a frequent traveler via air transportation, from guwahati, assam to bhopal, madhya pradesh via delhi.
For 4 years, my travelling to and from guwahati to and fro bhopal via delhi has been problem free.
Due to the corona virus pandemic, my university closed for the time being and i was sent home which i went and like always traveled via air transportation.

My flight from bhopal to delhi on 02/june/2020, was scheduled to depart from bhopal at 12:15 and arrived at delhi airport at 13:30, making it very comfortable to catch my next connecting flight from delhi to guwahati at 17:25. Due to unforetold circumstances, the flight was delayed and we arrived at delhi airport (Indira gandhi airport) at 16:00 and this caused me to miss my connecting flight.

Due to this, i complained and was provided a 'delay certificate' which availed me no relief and my parents with much hardship were forced to procure a new ticket for a flight the next day at a price of rs 13, 000.

Flight details

1) flight from bhopal to delhi : (Pnr no) : jlx9w, air india flight ai-482 but we traveled in ai-481.
2) flight from delhi to guwahati : (Pnr) : blp24n, indigo flight 6e-694 which i couldn't catch due to delay.

New booked flight booked for the next day at huge financial expenses.
1) flight from delhi to guwahati : (Pnr) : xhi88h, spice jet flight sg8152

All the evidence supporting my complaint is attached below along with bank details in case u believe i am entitled a refund.

Respected sir please do what can be done and what relief which i am due be provided to which i believe i am rightfully entitled to a refund for the flight i couldn't catch due to the delay which i had no hand in.

Mobile no : [protected], upi ids : [protected]@oksbi