VR Calender plugin to sync with FreeToBook for holiday let site

Site URL: https://www.uniquecotswoldcottages.co.uk/book

Hello 🙂

We currently have a LINK from our Squarespace site to an external booking site - 'FreeToBook' - which allows the site visitor to book one of our holiday cottages.  We would like to add a calender PLUGIN that shows several months of our availability at a glance AND syncs with FreeToBook.  We think that the plugin VR Calender will do this but we will need to embed the code. 

Do any of you clever people have experience of this type of thing??

Many thanks In advance 

Maddy