I used A2B for years and despite many people suggesting I was paranoid/misinformed, I can guarantee my CC details, from a transaction with A2B, was hacked or whatever to book flights & hotels to the tune of £1002.
My bank rang me almost immediately, it was all stopped, and I did not lose £1002 or have to claim it back or prove it wasn't me.
I have booked A2B since and have no more concern in doing so than I would booking or buying anywhere else. The way some people talk is like there is someone in the A2B office in Fethiye with a dodgy terminal he bought from China on eBay, stuffing home made plastic cards with our details on, to pay for his life of Reilly.
It's ridiculous - it could happen when you use your card to pay for anything, anywhere.