I don't think SE will do anything. Plus you already admitted someone was impersonating you intentionally that you asked for. Theres no reserving names, either you have it or you don't. Thats a problem in its own. As far as i see they should give the op a temp ban just on the grounds for impersonating.

The name itself is also a common name. You might as well ban all john smith sort of names if you think it break tos to have a common name.

For the discord message which i assume its from, thats discords issue, not SE.