A funeral parlour in Hong Kong mixed up two corpses and wrongly cremated one of them in a shocking blunder that deprived a bereaved family of bidding farewell to the deceased.An industry source told the Post that relatives discovered the mistake when Global Funeral Parlour in Hung Hom arranged for them to collect the body on Wednesday for a burial service the next day.That family later learned the corpse was not their loved one’s, whose body had already been cremated before they had the chance…