Hi @siobhanjoneill and a very warm welcome to the Community Forum.
I am sorry to hear of your sitter’s cancellation. Did they give a reason for cancelling?
The cancellation insurance would not apply as the sit is still a long way off and you do still have time to find a suitable sitter/s. I do understand your concerns but try not to worry as you do still have plenty of time, there are still many sitters who haven’t sorted out their Christmas sits yet.
I would suggest that you add your TrustedHousesitters profile on to your Forum profile on here by following the attached link, should you wish. This will then enable others to offer you helpful advice and feedback for your listing and will also give your listing extra exposure!