The way blockchain technology works don't allow transactions to be canceled or reversed.
This is beyond our control!
In this event, the only solution for you would be to try to contact the person that has received the funds and get that person to return the funds.
If you do not have any pieces of information about the owner of that wallet, there is no way for you to get your funds back.
When you send your cryptocurrency, make sure you double-check that you send them to the correct address and be 100% sure that you are sending them to the matching address of the receiver.