Fixed edit

Take this off the shop if you can't even play it..

Any serial key present in the library should just be for online multiplayer.

Ok i tested and it works without cd key it's only for GLOBAL ONLINE which is extinct ofc sorry for trouble love you gog

I noticed you edited out the OP, but I wanted to point out two things anyway:
1. Bear in mind getting a response from support takes time. For my last support ticket, I got the usual automated message saying it may take 2 weeks to hear back from them. If you don't get a reply after that long, you can try sending a polite reply to your ticket. Many have reported getting a response fairly quickly after that.
2. This issue doesn't sound urgent, but if you've waited a long time, you can send a polite chat message with your ticket number to a staff member.