Tata Docomo — balance deduction for subscription service without consent

Address:

560066

My balance has been deducted on some music unlimited service that was initiated without my consent. I just found that this has been happening for 3 times (Rs 75*3) for a validity of 20 days each. My balance has came down to Re1. I want the refund to happen at the earliest. When I call customer care, they are did not refund it. They are not talking in english even though my language is set as English.
My tata docomo number is [protected].