Hi Atakan,
Thanks for bringing your issue to the attention of the Community - welcome 
Just to be on the safe side: Have you signed up for two cards and got one surplus card or did you actually sign for all 3 cards?
The documents you were handed out, I assume, should show if the third card is charged monthly.
In any case, it's understandable you feel unhappy about the way this issue was handled so far.
Feel free to send me a private message and I'll try to resolve this.
Best regards
Micha
