Reliance Prepaid Mobile — Amount being deducted by company unethically.

I have Reliance Communications prepaid mobile. Whenever, i recharge amount, within a few hours, almost the entire amount is being deducted by the company by activating some unwanted sub services, without being subscribed by me. When i send SMS for un-subscribing of such services, a reply comes " try later. Not responding" etc. As a result, whenever i want to call on my prepaid mobile, there is nil balance in it and i am facing lot of hardships. This is nothing less than stealing the customer's amount by the company. This unethical and illegal deduction of customer's amounts should be stopped by the company immediately.