Wrong server

We have just set up a server for 90 days. After paying we see that it is for the pc. How do we change it to PlayStation 4? I think we just wasted a bunch of money because I find no way of contacting anyway to try to change this. If anyone knows how we can do it I would appreciate it. Thanks

I am literally trying to find how to do that but it keeps me in a loop back to start. Very frustrating