RBL Bank — credit card cancellation request no proper response each time they lies

I Have Raised Several Request for My Card Cancellation but No Proper Response. My Service Request Number is 03295043. Each Time Their Representative Lies About Card Cancellation. Card Last 4 Digit is 0123.
When I Asked They Told Me Your Number Was Not Reachable At The Moment.
I Received Thousand of Call In a Day. Kindly Resolve This Issue As Soon As Possible.whenever we call on your customer care need to wait for 5 minutes to talk with representative then he again need time but no response i dont think any other bank in india provide same kind of service.