Since this case involves an issue with sports betting, I don't think Casino Guru and Ask Gamblers will consider it. I remember they only handle casino disputes looking at some past cases. You will have to find someone else. Some services that were mentioned before include The Pogg, Casinomeister, and Gamblescope.
I don't know anything about the quality of neutrality of their services, though. That's something you will have to check yourself.
Isn't it easier to provide some evidence here? or at least write something on this occasion in this topic, I'm sure that they don't give a damn and they won't write anything else here, they have such an attitude towards the players. Yes, you are right, my case is related to stakes and asgamblers will not deal with this.