Vodafone India — mazuma mobile pack

On 13/11/2019 i received a sms that mazaa mobile pack was activated on my number. I had not opted for such pack. It has charged me rs 49/- and left with a mobile balance of rs 1/-. I have sent stop to number:155223, the pack has got deactivated, but i didn't get back the amount charged. I have not choose such a pack and my total mobile balance has been deducted.