The answer is "Go-around". However an excessive ROD is difficult to achieve in the last 100', unless somebody has a death wish, when you have the right to takeover and execute a missed approach. But may I suggest that long before you get less than 100 AGL, the ROD would already have been excessive in which case you would have been making the appropriate calls. If no response to these calls, action as above. As for a lack of flare - do you really want to fight over the controls at zot feet? Neither you nor the pax are unlikely to be injured if you do nothing and a heavy landing may result. So what? The important thing is not to make the situation worse. Once on the ground, ring your company and/or union for advice.