Asking for help from Bloggers

Dear Blog Buddies: twice now I have had someone comment on my blogs and the source is either in Chinese or Japanese so that I cannot put the name of the e-mail in to block it.  In the body is a long line of dots after the comment with underlining.  If I hover the cursor over this dotted line, It shows adult sites, suggestive sexual video's etc.  I have contacted my Internet provider but I need a name to block this site.  Have any of you had the same experience and did you find a solution??  I will be most grateful for any help, THANKS!!