F2Pool owner is now asking the community what they should do with the funds:
https://nitter.cz/satofishi/status/1702095123981738437#mGiven how much PayPal are more than happy to screw over regular people for literally no reason whatsoever, I have no strong feelings either way what happens here.
do transactions like in this thread when a person mistakenly paid higher fees without knowing about it will get refund from miners?
No. You rely entirely on the good will of the mining pool operator, and they are under no obligation whatsoever to refund the fees.
or when the transaction is verified by an unknown miner then how can anyone will request for a refund and where will he find that unknown miner?
You can't, unless you can look at the address they received the block reward to and somehow track them down from that.
what if the miner denied to pay the refund? like if we lost our money then we can complaint to police, is there any authority in this type of case?
You can't contact the police because the miner did not steal anything. They simply mined your transaction, the fee of which you chose. If you chose the wrong fee, then that's your fault.
do the huge mistakenly sent transaction fee also shared between every miner of that pool?
Yes.