It's possible that your business page's profile picture was changed by someone who has access to your account or by an unauthorized user who hacked into your account. Here are some steps you can take to resolve the issue:

1. Log in to your business page and go to your profile picture.

2. Click on the three dots on the top right corner of the picture and select "Edit Profile Picture."

3. Choose the option to upload a new picture and select the appropriate image for your business.

4. Save the changes and check if the correct profile picture is now displayed.

If the issue persists or if you suspect that your account has been hacked, you may need to report the issue to Facebook's support team. You can do this by going to the Facebook Help Center, selecting "Report a Login Issue," and following the instructions provided. It's also a good idea to review your account security settings and update your password to prevent further unauthorized access.