PaySense — refund complaint

Dear sir/madam,
I am taking a topup loan from paysence and my on going loan is closed.
But they deducted EMI of closed loan.
I was sent a many mails to them.
They said technical error your amount will refund in 15 days. Every time I complaint they said same answer. Now it is more than 50 days.
I am not pay the current EMI because they have my money enough to clear Emi. But they are collected 690/- for late payment. I don't understand what they are doing.please help me.