Beautiful aquarium, but horrible service, watch for your money!

Beautiful aquarium, but horrible service, watch for your money! We bought tickets online for two adults and two kids. At the entrance we were told, that our 12-years old son needs an adult ticket. We asked if we can simply pay the difference in price between the child and the adult ticket, but the lady said that we have to buy a whole new adult ticket. We asked if we can get refund of the already purchesed kid's ticket at the box office by the entrance, but they told us that for refund of unused child ticket we ought to send an e-mail to their e-mail address. Now, one month later, we still haven¨t received neither money refund, nor any response to our multiple e-mails. When we call Poema del Mar Auqarium on the phone, they answer, that the person who's supposed to handle this "has been sick". Kristoffer Burski, Oslo, Norway.