Hi Courtney,
Thank you for your reply.
I have carried out the testing. I have used a subdomain folder to do the staging. Changed the theme to the 2017 theme. The calendar seems to respond as should in this theme. I then changed the theme back to the Churchsuite theme and the responsiveness breaks. I then deactivated all the plugins and then only activated the Events Calendar plugin with the Churchsuite theme and the responsiveness is still broken. I am assuming there is an incompatibility issue here. Please can you advise how to proceed forward and how to fix this issue.