Original Poster,
I don't know if you can do this, as I haven't had to try, but as Mark mentioned, you should immediately change your Community name if you can. NEVER reveal your SAN (account number) in public.
As for your issue, it's possible that the charge was placed for the call due to the tech finding nothing wrong. Whatever the case, I'm sure a rep will take a look. They're normally on M-F from approximately 9AM to 6PM EST. They usually answer within a day or so, but when coming back from a four day weekend like this it may take them a little longer.
Again, though, I can't stress enough trying to change your Community name.