[Resolved]  Vodafone — Unsoliciited messages appearing on screen (not sms)

We keep getting these unsolicited messages on screen in the form of quizzes and tips.
If you press the OK button, you get charged for it so you have to press the "Back" or the "Cut" button.
We have two vodafone post paid cell connections and we are registered on the "Do Not Disturb Registry of india".

These unsolicited messages which appear on the screen cause the following probles:
1) They are unsolicited;
2) If you press "OK" by mistake you get charged for it;
3) You have to press "Back" or "Cut" so that you do not get charged for it;
4) The phone light becomes on when the message comes thereby consuming lot of energy and phone needs to be charged again and again;
5) These messages come throughtout the day and night.
6) I have old parents for whom getting rid of these quizes and tips becomes difficult and if they innocently press the "OK" button we get charged for it;

Vodafone is a nuisance.