Hey Felicia,
Thank you for writing in to us.
Kindly note that, for the ticket you purchased, the gardens of Versailles are including and are open from 8:00 AM to 8:30 PM, except for, as stated on our website and the official website of the Versailles, on the days of Grandes Eaux and Musical Gardens (from April to October), Versailles Passport ticket is required to visit the gardens. The Musical Gardens show happens every Friday and it is on these days that entrance to the gardens requires an additional ticket. Since the date of your booking was September 8th, a Friday, that explains why the gardens weren't included during your visit. Apologies for any confusion caused.
Sincerely,
Viraaj
Head- Customer Success