Complex sentence: Childs returned to Australia in May 2013 and claimed on Facebook that although the trip had not gone as planned as he had been let down by his American agent, he had been offered a contract to release his album in the US and France.
Split into simpler sentences: Childs returned to Australia in May 2013 and made a statement on Facebook saying the trip had not gone as planned because he had been let down by his American agent. He claimed he has now been offered a contract to release his album in the US and France.