A bad Eating Experience

Floki and Siggy are from Sweden. Last year, they went on holiday to Spain. One night, they went out for their dinner. They looked for a good restaurant. Outside one restaurant, they saw a man and a woman. The man looked cool and he smiled. Floki and Siggy greeted him and he answered in Swedish, their language! He told them he was Swedish, like them. The restaurant was called "Ia Hacienda'. They asked the man if it was a good restaurant. He recommended it and said it was excellent! He said it had the best food in Spain. Floki and Siggy trusted the man because he was from their country and went in. They sat at nice table beside the window. They ordered paella. The waiter brought their dish. It was terrible! There were only two small prawns in it, the chicken was undercooked and the rice was sticky and horrible. The wine was like vinegar and the water was warm. At the end of the meal, the waiter gave them the bill. It was very big! When they left the restaurant, the Swedish man was still there. Floki and Siggy told him he was wrong about the restaurant; they said it was dreadful, really awful! They asked him: "Why did you recommend it?"
'Because I am the manager,' he answered.

Answer the question!

What did Floki and Siggy tell the Swedish man about the meal?