ymo1965: When will I expect to get a response/refund regarding a game that refuses to work? I haven't heard a peep out of customer service/support since I filed a support ticket. I have paid for quite a lot of titles and this is the first to give me issues (rune classic).
GOG support usually responds in less than 24 business hours, with their hours of business being normal global business hours local to Poland where they are. That would be something close to 9-5 Monday to Friday excluding holidays. So if you file a support ticket any time from Friday morning until early Monday morning before they open, you might have to wait until sometime throughout Monday to hear a response back. They do not have 24/7 support though, but they are very prompt every time I have had to submit a request and I've probably done 10-15 or more of them.
For game refunds, the policy is to try to help you to get the game to work first I believe and if that is not successful then they will do a refund however I've never needed to even try to get a refund because either the games work no problem or if I have had a problem I've either found the solution in the GOG forums or someone else here helps to get it going, or sometimes I find a solution in the Steam forums or via Google that does the trick. I always try to do that first rather than bothering GOG support though as I often find solutions in minutes rather than waiting for a support response (even though they are great at responding). Any time I have needed them to try to help get a game going, they usually have a one sentence answer that has the solution for me and it ends up working first try. That's been my experience so far and I'm quite happy with their support.
I'd recommend giving them a chance to help you get Rune to work and to try the GOG forums for that game as well. I have the game here too and would be willing to try and install it and see if I can reproduce your problem and perhaps help figure it out together if you'd be interested in trying that. (I haven't installed it yet myself)
Let me know if you'd like to give it a shot. I hate to see someone return a game and miss out on the fun they hoped to get from it due to a technical glitch. :)