I am trying to book a holiday for 2 adults and 2 children at the Sol Costa Daurada, Salou via Expedia (I already have flights)

I am through to the billing page and it will only guarantee the 2 adults and says that I have to contact the hotel direct (how do I do that?) to confirm that they have availability for the children.

I am reluctant to book but it is such a good price that my finger is hovvering over the confirm button. What if I get there and there is no room for the kids?

Has anyone else had experience of this.

Many thanks