Since the digital transaction protocols are often an irreversible process, it is, probably, unlikely that you will receive your funds back if they were sent to the wrong address.
It is advised that you contact the receiving party and seek their cooperation in returning the funds. If you do not know the owner's address, it is very unlikely you could retrieve the missing funds.
To prevent this from happening it is essential to be extremely cautious when sending. It is advised that you double or even triple-check that the address you are sending, matches the address of the recipient.