I’ve never had a business need to communicate with me to issue a credit card refund, much less share the viewing the transaction on my computer.
I wonder if the ‘access your computer’ BS was so they could replace the text reflecting your balance with balance+10000 just to help convince you the made a transfer. Did the business you recall having a transaction have ‘exchange rates?’
No exchange rates mentioned. But my account balances are all secure as of today so they didn’t have enough time to do anything.