I'm no expert either (I don't even have a CC), but I really want to help in this case against those criminals. I think the best thing to proof it is to compare the exact time of deposit with 10bet with a statement from the CC-company where they explicitly state that the transactions were authorized and good. I guess that is not so hard. I suppose if you explain the CC-company you have an issue with another company, they are willing to assist.
GL.
GL.