Thnx for the impact. I have tried to contact them today, via the page given above, but its still the same google captcha error, so i guess its not possible to file a complaint via the link richy.casino provided on their site.
You can also try to file a complaint on casinoguru or askgamblers if they are making you wait too long. This might force them to come out and try to "resolve" the issue publicly. I am seeing some withdrawal complaints on casinoguru some of which were resolved.
Here is the link for casinoguru -
https://casino.guru/complaints/create