A group of cyber criminals, known as DragonForce, revealed a severe hack on Co-op, contradicting the company's statements.Co-op confirmed that hackers accessed data of a significant number of current and past members, including personal details.The hackers claim to possess private information of 20 million Co-op membership holders, which the company has not confirmed.Government issues warnings to businesses to prioritize cybersecurity, while Co-op customers are advised to monitor accounts for suspicious activity.