Same happened with me for Vodafone. For every spam number I raise complaint through SMS, I got call from Vodafone saying that necessary action has been taken. But while doing that they again "disturbed" me which was same as getting spam call. At 1 instance, I got call at 8 PM informing about action has been taken
Idea has worked well for me in Delhi NCR region. Have not gone out since I migrated to it. Idea 2G gives me great coverage for making/receiving calls even in the basement of the house. 3G on Vodafone gives me decent speeds outside. But I have to switch between the two modes in house because Vodafone coverage appears to be horrible here. I get shitty network in my house if I am on 3G network.