Analyze the cause of the problem using the evidence and situation.
The root cause is excess thrust being produced by the tail rotor (if Left turning Rotor.....insufficient thrust if Right turning Rotor) for the situation laid out by the original post.
Reducing RPM cures one (left turning
) by reducing Tail Rotor thrust, lowering the Collective reduces Toque in the other.....and rotation should decrease in either case.
If the rotation remains excessive for a safe landing....fly away and make an approach using minimum RPM and maintain forward speed until within a foot or so of the ground and decelerate until the aircraft is aligned with the movement alocross the ground or at a hover.....and land (left turning Rotor).
Understanding all factors that pertain to Torque control beyond just the Pedals is the key. Just as far too many fixed Wing Pilots fail to know what the Rudder can do on an airplane.....far too many helicopter pilots fail to fully understand "torque" in helicopters.
Right turning Rotor.....fly away and make an approach and running landing using least torque possible....or autorotation expecting some rotation at touchdown.