What have you tried that's giving you the crappy file?
I've used Scandy Pro[1] a few times and was surprised by it's resolution and ease-of-use. Only downsides are it's iPhone only and you get 1 free scan/24 hrs.
I've gotten ok results with large objects like a chair. But for small trinkets like a figurine or something, I get almost no depth detail, almost like I smoothed the surface.
I've used Scandy Pro[1] a few times and was surprised by it's resolution and ease-of-use. Only downsides are it's iPhone only and you get 1 free scan/24 hrs.
1- https://www.scandy.co/apps/scandy-pro