Getting sabotaged by a reviewer at IJCAI [D]

Recently got the reviews back from ijcai, now all is good except for this one reviewer who has not read the paper in depth, and is making false statements in the review.

This reviewer is saying that some stuff is not explored which is clearly shown in the paper. They are also angry that we did not cite a particular work, and suggests us to do extra experiments on that work (which is against ijcai policy)

What should we do, he is clearly sabotaging us, do we reach out to PC via chairing tool? Do PC respond to query like this? Do we include extra experiments in the rebuttal?