[Resolved]  HDFC Bank — hdfc life getting unwanted messages

I am very frequently getting unwanted messages from rm-hdfcsl, hdfcsl headers of hdfc life on my mobile number [protected]. I have repeatedly complaint on their customer care and email but no action is been taken. I still get the messages. I just want them to stop sending me these messages. Its been more than 2-3 month now that am talking to these guys with no satisfactory response. I dont understand why they need so much of time to just unsubscribe one number.