To avoid unwanted telemarketing calls or SMS, You can register your Idea's telephone number in Idea's Do Not Disturb registry.Activating Dnd By SMS
Send an SMS with the message Start 0 to 1909
OR Call 1909
and follow instructions Please click here For Full Instruction.
If You are registered under DND and if you are getting sms and promotional Call from Any one you can lodge a Compliant against them . To Register Compliant click here