United Bank Of India [UBI] — deducted money for transaction failed

Address:

Howrah, West Bengal, 711103

My transaction was failed when i was trying to book a flight using phonepe through my ubi account (A/c: 1532*9839) but deducted the amount from my ubi bank account rs. 5313/-. I complained about this many time to the bank (United bank of india besus branch - ifsc code - utbi0busf63) but till now i did not get my amount back to my account. Already, two months have passed away. Please help me with this problem.
Details of the transaction:
Date: 05th dec 2018
Time: 05.56pm
Transaction id s181205175554419520641
Flight details:
Paid to (Goibibo flights): rs. 5315/- (Debited from
Phonpe wallet: rs. 2/-
+
Ubi account: rs. 5313/-)
Route: blr-ccu
Date: 20th dec 2018 (6.25pm-9.30pm)
Passengers: 1