Dsp Blackrock Mutual Fund — return of money and closing of fund

1 year ago i had taken an sip of 2000 per month with dsp black rock. Two months ago i had asked for it to shut down. I signed the relevant forms but last and this month money for further deducted, (And returned lower than principle amounts due to market conditions). Apart from wrongful deduction, money has still not been refunded and my agent (Yes bank) does not seem to know a timeline as to when the refund will happen. More than 15 working days have passed