AF, i m sorry about what you and your Mrs. went through, and i am sure you will get a response here soon.
My question though is,why didnt your wife insist on collecting a receipt when she parted with the money?
And unless she was able to get hold of the names of the VK ground staff from their tags, this act could have been committed by other airport staff/nahco/sahcol/FAN sec/etc.Just my 2 cents.