Bhim App — money deducted but not credited to the beneficiary account

I have paid the exam fees of rs.550/- to west bengal state university through bhim app but after waiting for more than 72 hrs the amount was not credited to the beneficiary account and i have to pay it again through my debit card. I have raised the complaint to the https://bhimupi.org.in/get-touch but they saying me that the transaction was successful credited to the beneficiary (Recipient) merchant’s account. Request you to reconfirm with the beneficiary merchant.
Now please let me know who is responsible for this? And am i going my money back?

Note: my transaction i'd is[protected].