Translated by google:
>>Fraudulent activity
Yesterday, I purchased a new 18 Pro Max. Initially, I signed in with my own Apple ID. Later, following instructions from a Telegram bot, I signed in with a different Apple ID to install some apps. The bot subsequently changed the password, and now I am unable to sign out of that account. Please advise on what steps I should take; I cannot disable "Find My" (Locator) in order to reset the device to its factory settings. The phone is fully responsive, but it keeps prompting for a password.<<
Normally you can get the Activation Lock removed by the official Apple Support, if you have proof of purchase, as explained in this article.
Contact Apple Support - Apple Support
But, the official Apple Support can only disable the Activation Lock for your device, if it meet these criteria:
...
You must be the owner of the device.
Apple may require proof of purchase. Proof of ownership must include the product serial number, IMEI or MEID.
Your data on the device will be erased.
If Apple unlocks Activation Lock on your device, all files and data stored on your device will be permanently erased. Please note, restoring your device from a local backup will re-enable Activation Lock.
We can’t unlock a managed device.
If your device is owned by a business or educational institution, please contact your IT department or manager. We also do not accept bulk requests.
Your device must not be in Lost Mode.
...
copied from: Additional Support - Activation Lock
User level: Level 1 (4 points)
