Handbrake causes problems (Hebel locks way too late)

Hello, maybe someone can explain something to me about the phenomenon. If I put on the handbrake it attacks much too late, if it falls then it can happen that the Volvo rolls back. In other words the brake does not reach correctly. I read here in the forum that you can probably reposition the rope from the inside (in the center console), only with me nothing can be set, since already up to stop. Before I have the rope removed / or do it myself? maybe the problem lies completely where different. How to look at the best step by step where the problem comes from in order to be able to repair or adjust correctly. Even if I drive over cobblestones it clatters back right or left at the brake, then I step on the pedal stops the noise abruptly. Would be grateful about help. VG the snail