India Infoline Finance [IIFL] — Loan account close issue

I took a personal loan from iifl finance about three years back with regular emis. But now last few months since I had a rupee arrangement I paid the loan balance online then after a few days I checked again inside the app. The loan was still not closed and they were asking to pay again, so I thought that there might be a few days of interest due, so we have to pay Rs. .After that I tried to contact them many times through email in their chat box but they are not giving me any response. After that I went to different branches and tried to contact them but even from there I don't get any proper suggestion now the problem is that they add little by little daily and add penalty and the amount is big again I am fed up And I want to get out of this.