I eventually spoke with an Orange agent after waiting 1.3 hours on hold, it turns out someone subscribed to 2 premium youtube services. Ive since put a block on electronic payments. I hope this stops it.
Just to make sure - He should give You option called "blocking incoming and outgoing sms premium" (in polish: blokada przychodzacych i wychodzacych sms premium).
Gid You receive and sms like before after You`ve talk with someone from Orange?
Did You top up your account? Did You loose any money again?