Site is Down, unable to access

I’m in no way technical, and unable to get hold of my developer, but our website is down www.autoairconparts.co.uk with ip address ‘142.132.134.17’

Not sure if that means Cloudflare host the site or its hosted elsewhere but can anyone help? Need to get site back live. I have ftp, ssh access etc but assume that is only to the site once live? As I say I’m not technical just after advise on how to get site back up again, whoever hosts it