if the wrong Bitcoin enters my wallet that much, then I will return some to its owner

I would contact the exchange and send the coins straight back. Job jobbed.
It's not as if you could do much with it anyway. The moment you yourself send it to an exchange you're getting nailed for it.
you will send back.. I think is impossible lol
in this age, I'm very pessimistic that someone will return everything in its entirety, returning just a few Bitcoins will most likely happen
