Hey there,
The 522 error you are getting is because you are not allowing all Cloudflare IPs at your origin server. To stop this error from occurring you should allow all IPs from Cloudflare to reach your origin using port 443 for HTTPS connections. You can find a list of all Cloudflare IPs here: IP Ranges
Regarding contacting support, are you not able to open a case when you go to
https://dash.cloudflare.com/?to=/:account/support
If you are having trouble seeing the support tickets, you can also try the steps outlined in this document: Cannot locate dashboard account ยท Cloudflare Support docs