I'm sorry, you're having trouble rewinding the movie. Assuming that the entire film has been exposed and it is now time to rewind, take the camera to a photo lab or one-hour camera shop and allow them to recover the film safely.
You think that the advance of the film is fine, but this may not be true. It is often difficult to make this determination. If you are a frequent user, you will probably know by touch and visual cues that the movie progressed correctly. It is more likely that the movie was not loaded correctly or damaged. We're talking about sprocket holes torn off. In addition, mechanical malfunction related to the camera may occur.
You can open the camera safely yourself. Find a truly dark place. This can be a room without windows, etc. Total darkness can be difficult to achieve. Since only a small amount of scattered light will ruin the film, you must ensure that the work area is safe. Better if you take a chair. Take scissors and aluminum foil. Place everything in a suitable work area. Turn off the lights and wait maybe 15 minutes. This downtime allows your eyes to adapt. Now you are in a position to judge whether the area is truly dark. If you can see your hands or the light coming in under or around the door, do not continue until you are sure you will be working in total darkness.
Now that it is safe to open the camera, you can manually remove the film and rewind it manually in the cassette. If you do not go back in the cassette, you can roll the film without the cassette. Wrap the rolled film with several layers of foil. If you are careful, the sheet will form a light tight seal.