Active PAYG account, no CSI, no self-service PTR option - literally no route to Technical Support

I've been an Oracle Cloud customer for over 5 years now, and in all that time I've never actually had a working support entitlement on this account. This PTR request is just the thing that finally forced the problem into the open.

Here's the situation: I'm on a Pay As You Go account in the Frankfurt region, and all I need is a reverse DNS (PTR) record for a public IP running my mail server, 89.168.104.233, pointing to mail.arbaoui.me. The forward DNS record is already set up and resolving fine. Oracle's own docs say this needs a support ticket, there's no self-service way to do it.