Kotak Mahindra Bank — Im complaining about kotak group secure one policy

I'm facing a problem since 36 days, And already given complain to kotak life insurance, Kotak group secure one activated a policy worth 2634.35 rupees directly without permission. I tried to complaining to kotak mahindra life insurance but they say that we can't help you. I tried their toll free number [protected] but it's always busy. I also tried an email but they just saying that we would refund in 10.days but they can't.