Time to change banks? This goes on all the time I bet and the telling part of the statement is in the first line : it was stopped!
"We would like to inform you that HSBC recently identified and stopped a cyber-attack on our credit cards and debit cards systems in Turkey. On identifying the incident, we took immediate action to safeguard our customers. We launched an investigation that is ongoing in cooperation with the Banking Regulation and Supervision Agency of Turkey (BRSA) and other relevant authorities. All card operations of HSBC Turkey are functioning normally. "