I tried to raise a complaint on CG but this is their answer:
Dear complainant,
[...] Unfortunately, we don't have a branch dealing with sports betting yet, but we can suggest three websites which do:
Ahh, my apology, in the swamped state I am currently in, I forgot about the sports-related nature at CG. May I recommend AskGamblers? Far as I know, they mediates sports-related issues, and BC is on their list too. They might be able to mediate.
Did you got any answer from BC? Can they provide my bet history at least to me so I can share?
I'll try to suggest this when I get in touch with them, but won't it be better to get it done through AG first? Especially with the previous concern about validating a minor league game over a year ago.