Please edit your signature by using this code as replacement for your user name, and get rid of your image on the right after the time and date. If you would like to practice using it until you get it right with me on this message wall, I would be happy to help. Thank you.
What may be easier is to create a subpage with just your signature e.g. User:AxG/Name, and then in preferences put {{subst:User:AxG/Name}} in the custom signature.
Hello, I noticed you tried to contact Nyami's most recent account to get the user to stop. However, that is not the best option to deal with Nyami, as that is just feeding the fire and engaging the vandal. The best thing you can do is ignore the vandal and report Nyami's accounts to Logopedia:User Reports and let an administrator handle Nyami. Thank you.