Indeed our official support is now in this area. There was correspondence sent out on this quite a while ago. Note, if there is private information, we can always create a ticket out of it, dont worry.
Anyway, on to the issue at hand there. Unfortunately there is no solution I can give you here that will allow you to use an older PHP version for the platform. You would need to reach out to your hosting company to see if you can set different PHP versions in different areas. This can often be done with htaccess files, but it will depend on your particular hosting