How did you manage to pay the bill for a different number?  I think the chances of you being able to recover that is incredibly slim to none.  If you paid it in-store and have a receipt, then that would be your very slight chance.  Otherwise, you are out of luck more than likely. 

You'll wanna Community-2153​ and speak with our Care folks. We have a process for misapplied payments we can try to resolve this for you.

I accidentally paid off my galaxy 4 classic watch my phone number is 346-284-7928. My email is bradw24961@gmail.com.  I really need my money refunded and stay with my regular plan