How to stop the hacker is attempting to access my hotmail account from Singapore?

On April 9, 2026, I purchased two SIM cards at Vista Road in South Buona, Singapore. The sim cards had a 30-day expiry date, and the female clerk asked me for an email address for registration, I gave her my hotmail address. Then, starting on March 10, 2026, hackers from Singapore have been attempting to access my Hotmail account every week. I would like to request that you investigate whether the registration process for this service is related to hacking activities.