Rude staff and unexpected unapproved charges

I Told the lady that phoned me on Monday that I don't want to add subscriptions to my account. I want to leave things as they are. Now today I get an SMS my invoice is more than what it has been since I started this contract. And the rude people at customer care says I did it myself but. It is supposed to be that my invoice is supposed to be the same. They realy need to do something about their rude staff that don't listen to your problem.