Does anyone know how I can contact them? They stole $2000 from me
Ignored in chat.
No response to email.
Blocked in Discord.
Silent on Twitter.
Why then do you write that this is a big and reliable casino?
Your screenshot doesn't prove anything maybe you should post the real evidence on your accusation so that people could see that there's really a problem exist on your side.
Create a post also in scam accusation section for proper exposure so that people could see your existing issues with chips.gg but as well post all necessary proof and for sure you provably get help and sympathy if you can show those necessary things to support your case.
Many write that they are big and reliable because of their experience but you can change their view if you can post a relevant proof that you are been compromised by them.