Vodafone — Vodafone automatically deducting balance without any concern from customer

My mail to vodafone -
my mobile number [protected]
i was having 474 smthg as main balance but today it's only 425 why
where it is gone immediately? I always have unlimited plans with unlimited voice and data then why?
i am not subscribed to any service i don't want any service only let me peacefully talk

there reply-
Please find the below charges and descriptions:

· The content download DNLD-WWAP_DLS0049_PPU_KIN01467053 on[protected] at 05:30PM with a VAS type of PPD/PPU for a subscription of amount Rs.49/-

i remember i have not downloaded anything or subscribed to anything then also vodafone kep on deducting 49 rupees everytime without any sms/mail notification.