Advertising FB /Inst IT camps for children in Barcelona

Advertising expensive IT camps for children in Barcelona. The price of the camp is approximately $3500-4000 per change for 2 weeks. The advertisement was set up with the purpose - conversion and led to the site. The website was full of information, the camp program and the price. The lead is as relevant as possible.
In 20 days of advertising, 42 lies were collected at the price of $11.9 per ice and all spent $500. As for a high-margin product with a price of over $3500 the price per ice is $11,9 and 42 is a very good result.