Since you can't provide any real information about your special superduperskills = scam. There's nothing you can do.
It's just a scam, get people to contact you, a scenario like this or similar, someone is asking you for help, they are desperate, you asking them how much in deposits are we talking about etc, oh it will cost you 10% of it and I need to get paid before etc etc. Just get out please.
It's either merchant, casino, payment processor, or acquiring bank and you can't do anything about those. These are the only actors involved. Unless you own Visa and MasterCard and are sitting there clicking refunds lol.