BHIM — bhim app showing success status but money lost

Name: apoorva kumar g
I did a person to person transaction on january 4th in bhim app of amount 20, 000.
In both mine and beneficiary status is showing success but when beneficiary checked account statement, beneficiary found that money was reversed immediately.
As its showing success in bhim app i didn't get my money back.
We contacted toll free numbers, banks mail ids but didn't receive any proper response (Transfer banks hdfc to sbi)
I even went to the npci developer office but they didn't help.
Now my question where that transferred money went? & how will i get it back?