I did not use this service but the girls in the image did. Unfortunately, they were billed for calls they had "supposedly" received from Switzerland. It may be a mistake among a thousand but it is worth noting that you are alert if you want to use these services.
Being the last step you take before leaving the country you do not have time for many discussions.
Maybe on the way back they were able to deny the payment through their bank although with purchases through VISA it is usually very difficult.
The same from Madrid or Murcia answer us.