I got same thing from celcom few years ago, got RM10 fly away because subscription from nowhere.

When I make complaint to their CS, they just say "this must be you subscribed by your own, we can only help you to unsubscribe it"

When I say I didn't subscribed to these services at all, their CS says BS like "maybe you clicked on some link on internet", WTF wow their service is so advance that their webpage can automatically know my phone number and subscribe the service without my consent.

I just found a good way to earn money, just become a sms service provider then spam the users with paid sms, when they want to unsubscribe charge another 50 cents some more for sending "STOP" to unsubscribe.