That's terrible Cathy! Hope it all gets resolved soon. How it occurred defies my imagination but from what I've read about such things, this type of fraud is often perpetrated by highly organised gangs with lots of resources at hand to make fake ID as well as credit cards containing real credit card numbers that have been gained in a variety of ways.
It's pretty scary to think that even though you think all is well, something like this comes out of the blue to make you a victim.

Kitty started a thread in Feb this year about card use in Phuket. I've just done a search for it and have posted my comments from that thread.....
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"I don't want to alarm people but the scams that you refer to don't just apply to credit cards......... they apply to debit cards used at ATMs through card-reading devices attached to ATM machines - you'd never know they were there but they read your card details and also your PIN and criminals can then charge stuff to your card or make copies.
People don't realise it's happened until a) they can't get their card back out of the machine (but that usually tips the customer off to something being wrong and then they can take action ) or b) the more sinister method.... you can get your card back but don't realise it's been skimmed until you or your bank start seeing transactions from countries where you've never even been.
In about 30 trips to Thailand I've never had money stolen or had a problem with any of my cards (credit or debit).
I always use ATMs in 'secure' areas - within shopping centres or BTS - these areas are very busy and security guards are around while these places are operating, so no chance for scammers to instal spyware on the ATM. That's my theory anyway.
ATMs on quiet side streets could be fiddled with late at night and nobody would see this being done, so best to avoid these."

The whole thread can be found by writing 'fraud' in the search box at the top of the page... a lot of threads will show.

About a year ago a friend sent me an email showing an actual photo of one of these devices fitted to an ATM. Then I saw an article in the Phuket Gazette about these card skimming devices being found on ATMs in Phuket. Apparently some tourist couldn't get his card out of the ATM slot and when he used a bit of force, the card slot and reader came off the ATM!! it was an 'extra bit' complete with card reading device fitted over the top of the real slot. Scary.