Making an SVG from a bitmap (JPG, PNG etc) is not just as simple as JPG > Save as > SVG. This does not work. Many programs will allow you to that, but all it does is put the JPG inside the SVG file. This will result in a file that is too large, and will be blank in GT anyway.
Also bear in mind how SVGs work and try to not ask for detailed photos/anime etc, as these probably won't get done as they take too much time to "convert" and some images are just impossible to do due to the 15kb size limit. You may be lucky at get someone who is willing to put in the time (many hours in some cases) and end up with an SVG that is split into more than one file.
Some logos may just not get done. Repeatedly asking will not help.