There's no way to get into the phone without passcode. Trying to guess too many times will also permanently disable it. That's the point of the passcode security - it's encrypted and Apple won't be able to help with this. Period.

Apple can help you with gaining access to their appleid, for iCloud data and activation lock on the phone. This requires a formal legal process, and varies depending on where you're located.

https://support.apple.com/en-us/HT208510