I am sorry to say this but I think it is already impossible to get back your OMG coin back to your wallet as they are already considered to be lost just like being lost in the wide and open outer space. This is the reason why we should be careful by checking twice all the details of the digital currency we are sending and make sure that the wallet where we are sending it is of the coin we are sending and not of another currency. You are not alone with this problem though so I just advise you to charge it to experience so we be very, very careful next time.