This is the second roll I took with my Minolta X-700 which I recently started using. The first roll came out completely fine but the second one I finished came out completely blank. I didn't open the camera before I rewound it and the staff at the camera store put the film in for me and everything was fine. I've heard that if the numbering at the edge of the negative doesn't appear there could have been a problem caused during the developing process. I'm trying to figure out if it's a camera problem through my third roll, which I didn't expose fully but rewound mid-roll and have taken to a different developing service. If there is a problem with my film camera I can repair it and fix the problem, but what if it's the store's mistake? I have no idea what to do. Does anyone have similar experience like this?
edit: it felt smooth when I was rewinding the film and the third roll, which I took to a different camera store, was fine as well, because when the staff was rewinding the roll, she said that one is completely fine. The film that came out blank was Kodak 200 colour, and the third roll I used was Kodak Pro Image 100. I purchased the film in early June this year. The film was in the camera for about 3 weeks. I always put the camera in my room and never left my camera in a car.
edit2: I brought the roll (Kodak colour 200) and it was a new roll which I purchased at the same store around June this year. Besides I checked it on the spot that the shutter was working properly (with the cap open to make sure it was winding well) and the boss of the store put in the roll.
Besides, there is no children in my household and no one else have opened my film camera before I rewound it, I can assure that. Also yes the strip is completely black from end-to-end and there is literally nothing I can see on the strip.