[Resolved]  BSNL Mobile — Automatic activation and deducting money of value pack service

I have been receiving message very frequently from bsnl (+[protected] that "thank you for using value pack service. You have been charged rs. 10. Pl let me know for what reason the said amount is being charged to my mob. Number [protected]. Further kindly do something for avoiding these bad activities and please do the needful to reimburse the deducted amount (40rs). I went customer care, palakkad. They told me to activate dnd by sending sms to 1909. And after activating dnd still i'm receiving the same. Please please help me...