I can’t connect my apple to my phone

See if you can recover the ID/password. Use every email address you can think of.

Apple ID - How to find your Apple    An iCloud e-mail address is an Apple ID.

Apple ID - Find              

If you forgot the Apple ID password, enter the Apple (iCloud) ID, and click Forgot Password. See if you can get a Rescue or Notification email option if necessary. Link to contact Apple Support at the end of the 2nd article.

Apple ID - Manage            

Apple ID – Forgot Password            

See if anything here helps. 

Watch -  Set up your.    

Watch - Unpair and erase your.   

Watch - pair with a new iPhone

Watch isn't connected or paired with your iPhone