Vodafone supports the telemarketers because when you complaint to them about telemarketing sms, they will take your complaint after much haggling and then after 5-6 days tell you that your complaint was wrong. This is because the number that you will complaint against could be a voda number and if they close that number, they will loose revenue from that number. Even if that number is not a voda number, they will are hands in glove with Airtel, Idea, Reliance, tata and act in connivance of each other and make sure that no number is shut down.