Zestmoney — Auto payment for Fraud Transaction

Fraud call made by me to the fake zest money customer care made me fall into this trouble, I had given otp to the person which he fraudently used for authorizing electric bill auto payment transaction. I had paid the first bill of 4073 in fear of CIBIL score fall. Complaint raised in zest money never solved the issue instead locked the account but of no use still received the auto pay reminder for the same and this time the amount is around 9424. Resolve me to completely close the zest money account and cancel the Nach mandate authorized by me for auto payments.