State Bank Of India [SBI] — refuse to track payment through arn no.

Address:

1657/11, GALI BOHAR WALI, KHOO BOMBAY WALA, INSIDE HATHI GATE, Amritsar, Punjab, 143001

I booked my ticket through phonepe, then i cancel ticket and they they said we gave your money back but i don't get it, then they provide me arn number to track the payment out and raise chargeback or dispute against same transaction but my bank is not helping me out with this issue they said we don't know what is arn and we will not able to track your money with arn, i called customer service of sbi but they told me the same thing and refuses to help me out, and i researched about this problem then i figured out arn's can be traced by bank side.

My brach code is 02407