Had a belt and tension bar replaced twice on my vehicle to stop the squeaking but it still squeaks either stopped or moving?
If squeaking while idling, spray a little water on the belt while running (CAREFUL!). If the squeak stops, you might have misaligned pulleys.
Are you sure it’s the belt or one of the belt-driven accessories?
Are you sure it’s not the suspension or steering?
Try using a length of old garden hose as a stethoscope to see if you can narrow down what’s making the noise. Was the belt/tension bar you replaced for a belt that drives engine accessories like the power steering pump, alternator, AC compressor, etc?