Could not find any match to such a site existing, do you have the spelling correct

About 6 months I had registered in humshakal.com website. Every month they are sending me a message to my mobile that "Thanks for using our Humshakal service. Your service has been renewed. Rs. 10 charged. Send STOPHM to unscribe" I sent STOPHM as reply but they are conntinuing my service. I have not cared even to my request to delete my account through their "contact us" page in their website. I am not able to prevent them from charging my account Rs. 10 every month. I fear, how long they go on charging my account. I tried to open the website but in vein. Their service is useless to me. They are exploiting my money. Can any one help me in preventing the said website from their illegal activity.