Repetetive calling inspite of being registered with DND

I registred for DND quite a long time ago and still i recieve calls and smses from various financial institution. My telecom operator says that everytime such calls come, i have to lodge a complaint with them. This is ridiculus as if i get call from 10 banks i will have to call my operator 10 times (along with the caller details) to get rid of the trouble. Continue reading