Muthoot — epay payment not reversed

I am following up your customer care people from past two months, but no correct response from any one of them...My loan account number is F13170
which has been closed due to your bad services amount paid 3620 on 4th feb 2019 10.29am my first complaint number is GL[protected] which has been closed without resolving. your customer care people told that they have sent the voucher to branch people but branch persons says that they have not received any voucher... till date no one is bothered to solve my issue.. i have made the payment thru paytm. paytm has confirmed that they have given the payment to merchant and the order id is [protected] reference number :26017172
this is riduculous noone is bothered to clear my payment...