Your first port of call here is the Sanitisation Log that was added in version 1.9.0 of the plugin.
You can get to this under Settings > WP SVG > Sanitisation Log. Find the file you uploaded and see if there were any issues with sanitisation.
Once you know what the issues are, go ahead and get in touch with us and don’t forget to paste in the issues you saw!
My SVG isn’t looking right after uploading it