PhonePe — my refund is not initiated.

Hi

I paid the amount of rs.663 in the medical shop through phonepe.
The merchant said no amount received although the amount was debited from my account.
So i paid the same amount again from phonepe app.
For paying 663 rs my account got debited twice for the amount of (663+663)
Rs.1324.
I contacted phonepe customer care on the incident day but still now i didnt get any proper response from them.
My refund has not yet received till now (18 feb 2019) after 16 days also.

Thanks,
'dileepan