Vodafone India — deduction of balance without any permission

My mobile no. Is [protected] in the name saheli chakravarti.
Yesterday on 7th october'2018 i recharged my phone with 50/= after which my balance was rs.43.85p at 11.39am.
After that, vodafone sent a message that rs.35/= has been deducted from my balance for activating some gamex weekly.
First of all i did not make any request to activate any such plan.
I asked vodafone to deactivate it immediately as i did not make any request for such an activation. I sent sms and they said that they have deactivated the gamex.
But vodafone didn't give my balance back.
I want my balnce back immediately.
My balance is not for stealing by vodafone. This is a public money. This is my money. Don't steal it. Give my balance back. Otherwise i will go for asking compensation.