Transactions submitted to the network and confirmed on the blockchain cannot be cancelled or reversed unfortunately.
Blockchain technology is created in such a way where transactions broadcasted and already confirmed on the blockchain are irreversible and we have no control over them.
Ownership over blockchain assets is designed to be unique to the holder of the Private Keys and if you've send any Bitcoin, Ethereum or other crypto currencies to a wrong address (we've all done it sooner or later in our crypto endeavours), unless you manage to identify the owner of that address that holds the Private Keys and they are willing to send that amount back, there isn't a way to vet your crypto back. The same applies in the undesirable event that your wallet is accused by unauthorised parties. If they manage to transfer your assets out of your wallet, there isn't a way for us to return them to you.
It's always very important that you triple check the address you're sending your crypto to and that you keep your wallet security information and your device safe.