What options do I have when a journal refuses my paper based on 1/3 review by a non-relevant referee?
Half-joking, half-serious:

Next time you're having some beers with some trusted colleagues, tell this story and gripe about this particular journal. For one, it will blow off some steam. (Caveat: I wouldn't recommend complaining to people you don't know well, at least if you are junior.)

Moreover, in the long run, this is how reputations are built or lost. If your colleagues are as upset by your story as you are, then they might tell it to others, avoid publishing in this journal, and/or decline referee requests from this journal's editors. (Conversely, if your colleagues think you're being unreasonable, you might get some useful advice.)

This would have only a minor effect of course, but it would do more than contacting the publisher: in the long run, authors hold all the cards, as a journal is only as good as the papers that get submitted to it.