We've heard a lot of reports about difficulty using SVG images in Word. Would you be able to use a different editor? Libre Office/Libre Writer seems to handle a little better. Or there's Scribus, which is open source desktop publishing, which is a little different from word processing, but it supports SVG....I think natively.
But I know, I hate when someone answers a question I never asked. But just for your info.
I have no idea why saving as WMF doesn't work. If you could share either the image with the problem, or some other image which shows the same problem, we can investigate. It's possible there's a bug. Or maybe there are certain options when you save, that can be changed, that would give a better result. But we would need the SVG image that's ready to save as WMF, so we can test.
If we can't make the WMF work, there should be a way to export a PNG at the proper size and resolution, so it doesn't get distorted. But let's start with the SVG file, and we'll go from there