I have the same issue but your solution isn't applicable to me. I don't see unused servers/services in the drop-down, only one server. However, I'm paying for two servers. In an earlier play-through I had rented a server, deleted my PC and restarted. Now I'm paying for two servers, the previous one, and my active one. How to fix? Anyone else have an alternative solution? My invoice shows the total for two servers.

There should be a drop down up at the top where a bunch of random ips are, you should be able to just remove them from that list. That's what I did and it went back to normal, even from four different computer restarts.

Thanks for the response! I'll check again, hopefully I can resolve it. I appreciate the help, cheers

im having this same issue

This is an extremely annoying bug that made me stop using rented servers at all. Once deleted, there was no way to make them stop costing money.

This should be fixed to make it easier to delete active rented servers, even IRL cloud services are easier to remove servers from than Greyhack.